- Statement A is correct: National Science Day is celebrated every year on February 28th in India. - Statement B is correct: The date February 28th was chosen to commemorate the discovery of the Raman Effect by Indian physicist Sir C.V. Raman in 1928, for which he was awarded the Nobel Prize in Physics in 1930. - Statement C is incorrect: The theme "Global Science for Global Wellbeing" was the theme for National Science Day in 2023. - Statement D is correct: The official theme for National Science Day in 2024 was "Indigenous Technologies for Viksit Bharat".