राष्ट्रीय विज्ञान दिवस कब होता है? A. 26 फरवरी B. 27 फरवरी C. 28 फरवरी D. 29 फरवरी

National Science Day is celebrated on 28 February to mark the discovery of the Raman effect by Sir C. V. Raman on 28 February 1928, for which he won the 1930 Nobel Prize in Physics.