Indian celebrates February 28th every year as "National Science day" because on this day...

Options:
A) In 1928 C.V. Raman discovered what was later called 'Raman effect'
B) First Indian space craft was launched
C) Vikram Sarabhai was born
D) Nehru laid foundation of science laboratories all over India
 
Answer : In 1928 C.V. Raman discovered what was later called 'Raman effect'