Father of Slave dynasty?

A. Quṭb al-Dīn Aibak 
B. Khizer khan
C. Behlol Lodhi
D. None of these

Slave dynasty, (1206–90), line of sultans at Delhi, India, that lasted for nearly a century. Their family name was Muiʿzzī. The Slave dynasty was founded by Quṭb al-Dīn Aibak, a favourite slave of the Muslim general and later sultan Muḥammad of Ghūr.