How many years slave dynasty ruled India?

How many years slave dynasty ruled India?

A. 82
B. 84
C. 86
D. None of these

The Slave Dynasty ruled the Sub-continent for about 84 years. It was the first Muslim dynasty that ruled India. Qutub-ud-din Aibak, a slave of Muhammad Ghori, who became the ruler after the death of his master, founded the Slave Dynasty.