The correct options are
B Maharshi Charak
C Maharshi Sushrut
D Vagbhatta
Aryabhatta was a famous Indian mathematician and is known for the discovery of 'zero'. Maharshi Charak, Maharshi Sushrut, and Vagbhatta pioneered Indian medical science and surgery through their intense research. They were known for their works and contributions to the field of medicine in ancient India.