Correct Answer: (b) Haji Begum
Solution:Haji Begum constructed mausoleum for her husband Humayun at Delhi in 1565-1572 A.D. as 'tomb of Humayun.' Mirak Mirza Ghiyash, a Persian, was the architect, employed by Haji Begum for this tomb. It is the first double dome mausoleum of Mughal Architecture A garden is surrounded outwards of the tomb.