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SOF NSO Answer Key 2025-26 for Class 1 to 12, Download PDF (Set A, B, C)
Edited By Dinesh Goyal | Updated on Jun 12, 2025 09:26 AM IST | #NSO
Upcoming Event
NSO Exam Date : 13 Nov' 2025 - 13 Nov' 2025
NSO Answer Key 2025-26 - The Science Olympiad Foundation (SOF) will release the NSO Set A, Set B, and Set C answer keys on separate dates in December 2025. The unofficial NSO answer keys are also yet to be provided by coaching institutes. NSO answer key 2025-26 for all sets will be releaed online on the official website, sofworld.org.
This Story also Contains
- Important Dates of NSO Answer Key 2025-26
- How to Download NSO Answer Key 2025-26?
- How to Calculate Scores with the NSO Answer Key 2025-26?
SOF will conduct National Science Olympiad (NSO) exam on November 13, November 27, and December 11, 2025. Last year, SOF published NSO answer key on December 4, 19, and 24, 2024 for Set A, B and C, respectively. Students should know that NSO Set A, B, and C answer keys are released separately. Using the answer key of NSO, students can compute their estimated marks in the SOF NSO exam. Read the article for more information and to download the SOF NSO 2025–26 answer key.
Also, know about: SOF Olympiad results date
Important Dates of NSO Answer Key 2025-26
The National Science Olympiad (NSO) is an annual scholarship test designed to develop scientific reasoning and logical abilities in school students. It is conducted at two levels. Students must note NSO 2025-26 answer key dates to make sure they do not miss any essential events. Check the SOF NSO answer key 2025-26 dates for levels 1 & 2 below.
| Events | Dates |
|---|---|
| NSO 2025-26 Exam (Level 1) Set A | November 13, 2025 |
| NSO 2025-26 Exam Level 1 (Set B) | November 27, 2025 |
| NSO 2025-26 Exam (Level 1) Set C | December 11, 2025 |
| NSO 2025-26 Answer Key for Level 1 (Set A) | December 2025 |
| NSO 2025-26 Answer Key for Level 1 (Set B) | December 2025 |
| NSO 2025-26 Answer Key for Level 1 (Set C) | December 2025 |
| NSO 2025-26 Result Date for Level 1 | January 2026 |
| NSO 2025-26 Exam Date for Level 2 | February 2026 |
| NSO Answer Key 2025-26 for Level 2 | March 2026 |
| NSO Result Date for Level 2 | March 2026 |
NSO Answer Key 2025-26 PDF Download
We will also provide the latest NSO 2025-26 answer key links once they are available. Using NSO answer keys for Classes 1–12, students can calculate their probable marks and compare them with NSO Cutoff 2025-26 to know the chances of selection.
The previous years' NSO answer keys are provided below.
NSO Answer Key 2024-25
| NSO Set A Answer Key | Download Here |
| NSO Set B Answer Key | Download Here |
| NSO Set C Answer Key | Download Here |
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Apply NowNSO Answer Key 2023-24
| NSO Set A Answer Key | Download here |
| NSO Set B Answer Key | Download here |
| NSO Set C Answer Key | Download here |
NSO Answer Key 2023 (Official) - Download Here
| Class | NSO Set A Answer Key | NSO Set B Answer Key | NSO Set c Answer Key |
|---|---|---|---|
| Class 1 | Download here | Download here | Download here |
| Class 2 | Download here | Download here | Download here |
| Class 3 | Download here | Download here | Download here |
| Class 4 | Download here | Download here | Download here |
| Class 5 | Download here | Download here | Download here |
| Class 6 | Download here | Download here | Download here |
| Class 7 | Download here | Download here | Download here |
| Class 8 | Download here | Download here | Download here |
| Class 9 | Download here | Download here | Download here |
| Class10 | Download here | Download here | Download here |
| Class11 | Download here | Download here | Download here |
| Class12 | Download here | Download here | Download here |
How to Download NSO Answer Key 2025-26?
Students can read and download the NSO 2025-26 answer key by following the instructions outlined below.
- Click on the link given in the table above.
- Your screen will display the NSO answer key for 2025–26.
- Now, press the download button.
- The answer key will be downloaded in pdf format.
- Start carefully examining the answers and calculate your scores using the SOF NSO 2025-26 answer key.
Also, check -
NSO Results 2025–26
SOF releases the NSO 2025–26 results online through the official website. The National Science Olympiad result is also sent to the individual schools by the Science Olympiad Foundation (SOF). Each participating student receives a participation certificate as well as a Student Performance Report (SPR). SPR includes a full review of exam performance in several parts. Gold, Silver, and Bronze medals are awarded to class toppers. The results will also be made accessible online.
How to Calculate Scores with the NSO Answer Key 2025-26?
To compute results using the NSO 2025-26 answer key, students must follow the marking scheme provided.
- Add relevant marks for each correct answer.
- There will be no negative deduction.
NSO Class 1 to 4 Marking Scheme
| Section | No. of Questions | Marks per Question | Total Marks |
| Logical Reasoning | 5 | 1 | 5 |
| Science | 25 | 1 | 25 |
| Achievers Section | 5 | 2 | 10 |
| Grand Total | 35 | 40 |
NSO Class 5 to 10 Marking Scheme
| Section | No. of Questions | Marks per Question | Total Marks |
| Logical Reasoning | 10 | 1 | 10 |
| Science | 35 | 1 | 35 |
| Achievers Section | 5 | 3 | 15 |
| Grand Total | 50 | 60 |
NSO Class 11 to 12 Marking Scheme
| Section | No. of Questions | Marks per Question | Total Marks |
| Physics & Chemistry | 25 | 1 | 25 |
| Achievers Section | 5 | 3 | 15 |
| Mathematics/Biology | 20 | 1 | 20 |
| Grand Total | 50 | 60 |
Frequently Asked Questions (FAQs)
1. Is there any negative marking in the NSO exam 2025-26?
No, the National Science Olympiad does not have negative marking.
2. Will the NSO answer key 2025-26 be released on different dates for different classes?
The NSO 2025–26 answer key is released on different dates for different sets. The SOF answer key will be released online.
3. Can I challenge the NSO 2025 answer key?
There is no way to provide feedback or challenge the official answer key.
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Have a question related to NSO ?
hi,
the date for the NSO result has not been officially declared by the authorities but as per the information the NSO is likely to declare its results in march 2025 , of the level 2 exam which was held on February 9 2025 .
to get more information keep updated regarding the dates by visiting their official website .
hope this helps
Kenma Kozume 22 February,2025
Hello
Lost admin card for an NSO (National Science Olympiad) exam .
To get a lost admit card , visit the official exam website , log in with your registration details and re-download it . If you are unable to do so then to recover it , I recommend reaching out to the official NSO helpline or support team . they should be able to assist you in recovering your admin card .
Make sure to provide your relevant details such as your registration number , name and the email address you used to register .
For more details check out link given below :
https://school.careers360.com/articles/sof-admit-card
Thank you
Mitali Sharma 02 December,2024
The science Olympiad foundation conducts the national science Olympiad. NSO set A exam was conducted on 18th October 2024 and set B was conducted on November 12,2024 and set C esam will be held on December 3, 2024. Result of level is expected in January 2025 and for level 2 and 3 is expected in February and March 2025. You can view sample papers by clicking NSO sample papers
Annu Kumari 28 November,2024
Hello,
The NSO 2024–25 answer key is released on different dates for different sets. The SOF answer key will be released online.
To download the NSO 2024-25 answer key, follow these steps:
- Click on the link provided in the table above.
- The NSO 2024-25 answer key will appear on your screen.
- Press the download button to save it.
- The answer key will be downloaded in PDF format.
- Open the PDF and review the answers carefully. Use the answer key to calculate your scores.
Here you can get the answer key of NSO : https://school.careers360.com/articles/nso-answer-key
Hope it helps !
Prachi Kumari 12 November,2024
Hello Sunidhi,
The cutoff for the Class 6 National Science Olympiad (NSO) usually varies each year, depending on exam difficulty and student performance. For the 2024-25 exam, it is estimated to be around 40 marks, though official confirmation will be available with the results. The Science Olympiad Foundation (SOF) typically releases answer keys a few days after the exam, so you can expect the answer key for the November 12 exam (Set B) to be available shortly on their official website. Keep checking there for the latest updates on answer keys and cutoffs.
For more details, you can check out an article by Careers360 whose link is given below:
Link:
https://school.careers360.com/articles/nso-syllabus
I hope this answer helps you. If you have more queries then feel free to share your questions with us we will be happy to assist you.
Thank you and wishing you all the best for your bright future.
kumardurgesh1802 12 November,2024
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