Humayun expanded the frontlines of the Mughal Empire but lost it to the Afghan leader Sher Shah Sur in 1540 who drove him into exile. Humayun took refuge in the court of which ruler?

Safavids of Iran

The correct answer is Option (4) → Safavids of Iran

Babur's successor, Nasiruddin Humayun (1530-40, 1555-56) expanded the frontiers of the empire, but lost it to the Afghan leader Sher Shah Sur, who drove him into exile. Humayun took refuge in the court of the Safavid ruler of Iran. In 1555 Humayun defeated the Surs, but died a year later.