Correct Option: C

Aryabhatta and Varahamihira belonged to Gupta age. During Gupta period education flourished and many great discoveries were made in these fields. Aryabhatta and Varahamihira, the two great mathematicians contributed in the field of Vedic Mathematics. Aryabhatta found and estimated the value of "Pi" to the fourth decimal place. Algebra was developed to a great extent and the concepts of zero and infinity were also found and symbols of numbers 1 to 9 were devised which was a great contribution in mathematics. Advances in astronomy were also on heights in Gupta Age.