Ajmer became the suba headquarters under the ____________.

Correct option is C

Ajmer became the suba headquarters under the Mughal Empire. The Mughal Empire was a powerful Islamic state that ruled over much of South Asia from the early 16th to the mid-19th century.
 The empire was known for its administrative and military organization, which was based on the concept of the suba or province.
 Ajmer was one of the important subas or provinces of the Mughal Empire, and it served as a strategic center of administration and military operations.
 The Mughal Emperors established their capital at Delhi, which was also an important center of political and cultural activity in the region.