Ujjain, in ancient India, was famous for the study of:

In ancient India, Ujjain was famous as a centre for the study of astronomy.

It hosted noted astronomers and served as a reference meridian for Indian calculations.

Veterinary science was not the specialty for which Ujjain was known.

Chinese philosophy had no place in Ujjain's scholarly tradition.

Community work does not describe the astronomical learning centred there.

Varahamihira and later Brahmagupta are linked to Ujjain's astronomical tradition.