Answer : 3. "A और B दोनों"
Explanation :

Mahajanapada of MatsyaJaipur, Alwar, and Bharatpur are the main parts of the Mahajanapada of Matsya. The metropolis of Shurasena Mahajanapada has been discovered near modern Mathura. Today, it includes the area of Alwar Bharatpur. Indraprastha was its metropolis and at present it covers parts of the northern Alwar region.