When did Qutub-ud-din Aibak die?

A. October 1208
B. November 1209
C. December 1210
D. July 1206

Qutb al-Din Aibak was a general of the Ghurid emperor Mu’izz ad-Din Muhammad Ghori. He was in-charge of the Ghurid territories in northern India, and after Mu’izz ad-Din’s death, he became the ruler of an independent kingdom that evolved into the Delhi Sultanate ruled by the Mamluk dynasty.