The correct option is C Ajanta
Fresco paintings are done on the wet plaster of a wall or ceiling by watercolor. So when the plaster dried up it becomes fixed. Ajanta frescos of Aurangabad in Maharashtra are world famous. These are found in the ceiling of Ajanta cave. The time period is 8th century A.D. It is a Unesco World Heritage site. Currently, digital conservation work is going on in Ajanta to restore the broken murals.