Which monument is regarded as the first garden tomb built on the charbagh plan in India?

The correct answer is B, Humayun tomb at Delhi. Built between 1565 and 1572 by his widow Hamida Banu Begum and designed by the Persian architect Mirak Mirza Ghiyas, it is the first tomb in India set in the middle of a charbagh, a square garden cut into four quarters by walkways and water channels. It also brought the high arched entrance, the double dome and the red sandstone with marble facing that the later Mughals repeated. It was the first Indian building of its kind to be placed on the UNESCO World Heritage list in 1993.

Option A, the tomb of Sher Shah Suri, is a magnificent octagonal tomb but it stands on a terrace in the middle of a lake, not a charbagh. Option C, the tomb of Akbar at Sikandra, is later and is indeed in a garden, but it follows Humayun tomb. Option D, the Bibi ka Maqbara, is from the reign of Aurangzeb and is a copy of the Taj.