The SOF NSO (National Science Olympiad) Class 7 Answer Key for the 2025-2026 Level 1 exam is expected to be released by the Science Olympiad Foundation (SOF) in December 2025. The NSO exam is conducted in three sets (Set A, B, and C) on different dates. Since the NSO Set C exam was held just today (December 11, 2025), the answer keys for all sets (Set A, B, and C) will be made available shortly this month on the official website, sofworld.org, and will also be updated on the provided page. Once released, you can use the respective answer key (based on your exam set) to calculate your estimated score for the 60-mark paper and check your performance against the NSO cutoff for Level 2 qualification, which will be held in February 2026. You can monitor and download the relevant NSO Answer Key for Class 7 directly here: https://school.careers360.com/articles/nso-answer-key