The correct answer is (c). Alauddin Khalji was the first Muslim ruler of India to issue coins in the name of the last Caliph of Baghdad, Al-Musta’sim Billah. This was done in order to assert his authority over the Muslim world and to legitimize his rule.
Qutbuddin Aibak was the first Sultan of Delhi and the founder of the Mamluk dynasty. He did not issue any coins in the name of the Caliph.
Htutmish was the second Sultan of Delhi and the successor of Qutbuddin Aibak. He also did not issue any coins in the name of the Caliph.
Alauddin Masud Shah was the third Sultan of Delhi and the son of Htutmish. He was a minor when he ascended the throne and was soon overthrown by his uncle, Alauddin Khalji.
Alauddin Khalji was the fourth Sultan of Delhi and the most powerful ruler of the Mamluk dynasty. He was a great conqueror and expanded the Delhi Sultanate to its greatest extent. He was also a great administrator and brought about many reforms in the administration of the Sultanate.
He was a devout Muslim and issued coins in the name of the last Caliph of Baghdad, Al-Musta’sim Billah. This was done in order to assert his authority over the Muslim world and to legitimize his rule.