Correct option is D
Ghiyas-ud-din Balban, a ruler of the Delhi Sultanate, introduced the practice of 'sijda' in India.
· Sijda refers to the act of prostration or bowing before the king as a sign of submission and respect.
· Balban, who ruled from 1266 to 1287, was known for his strict and authoritarian rule, and he implemented various measures to consolidate his power and establish his authority over his subjects. The practice of sijda was one such measure to emphasize the king's authority and control.
· Diwan-i-Arz in Delhi Sultanate was established by Balban.
· Diwan-i-Arz was essentially the Department of Military managed by Ariz-i-Mamalik. He was accountable for the regulation and preservation of the royal army.
· Qutbuddin Aibak because of his generosity, liberal donations or giving large sums in charities earned the title of 'lakh bakhsh' or 'giver of lakhs'.
· Qutbuddin Aibak was the first Sultan of Delhi Sultanate and was the founder of the Slave dynasty.
· Qutbuddin Aibak was a slave of Muhammad Ghori.