The ______ sultanate was ruled by the Sharqi dynasty.

The correct answer is Option 3- Jaunpur

The Jaunpur sultanate was ruled by the Sharqi dynasty.

The Jaunpur sultanate was a Muslim kingdom in northern India between 1394 and 1494, ruled by the Sharqi dynasty. It was founded in 1394 by Khwajah-i-Jahan Malik Sarwar, an eunuch slave and former wazir of Sultan Nasiruddin Muhammad Shah IV Tughluq, amidst the disintegration of the Delhi Sultanate's Tughlaq dynasty. Centred in Jaunpur, the Sultanate extended authority over Awadh and a large part of the Ganges-Yamuna Doab. It reached its greatest height under the rule of Sultan Ibrahim Shah, who also vastly contributed to the development of Islamic education in the Sultanate.

The other options are incorrect:

• Bharatpur and Agra were sultanates ruled by the Jat and Lodi dynasties, respectively.
• Delhi was the capital of the Delhi Sultanate, which was ruled by various dynasties, including the Tughlaqs, Khiljis, and Lodis.