Correct Answer: 28 February
Subject: 2025
Explanation: <p><strong>Key Fact:</strong> National Science Day is celebrated in India on 28 February to commemorate the discovery of the famous 'Raman Effect' by the illustrious Indian physicist Sir C. V. Raman on 28 February 1928.</p><p><strong>Additional Info:</strong> For this groundbreaking discovery of inelastic scattering of light photons, Sir C. V. Raman was awarded the Nobel Prize in Physics in 1930, making him the first Asian to win a Nobel Prize in any branch of science. In 1986, the National Council for Science and Technology Communication (NCSTC) requested the Government of India to designate February 28 as National Science Day.</p><p><strong>Why the other options are wrong:</strong> 12 January is National Youth Day (Swami Vivekananda's birth anniversary); 15 August is Independence Day; 14 November is Children's Day.</p><p><strong>Exam Trick:</strong> Raman Effect announced on 28 Feb 1928 → National Science Day.</p><p><strong>Final Answer:</strong> 28 February</p>