Under which Sultan of Delhi had Muhammad bin Tughluq served before he became the ruler?

Correct answer: (d) Khusrau Shah

Explanation

Before he became Sultan, Muhammad bin Tughluq (then called Jauna Khan) was the master of the horse (*amir-i-akhur*) under Khusrau Shah, who had killed the last Khilji Sultan, Mubarak Shah, in 1320.

Jauna Khan escaped and joined his father Ghazi Malik, the governor of Dipalpur, who defeated Khusrau Shah and became Sultan as Ghiyasuddin Tughluq (1320). Jauna Khan succeeded him in 1325.