The correct answer is option 3, Shahjahan. Shahjahan was the Mughal Emperor who transferred the Mughal capital from Agra to Delhi. He moved the capital to Delhi in 1648 and built a new city called Shahjahanabad, which is now known as Old Delhi. This move was significant as it allowed Shahjahan to have better control over his empire and establish a more centralized administration. The new city of Shahjahanabad was strategically located on the banks of the Yamuna River and was well-planned with wide streets, markets, and prominent buildings like the Red Fort and Jama Masjid. The transfer of the Mughal capital to Delhi during Shahjahan`s reign had a lasting impact on the city`s architecture and culture.