The correct option is B Qutub-ud-din Aibak
Qutub-ud-din Aibak was the first slave ruler in Delhi. His dynasty came to be known as the Mamluk or the Slave dynasty because of the humble beginnings of its founder as a slave. Mohammed Ghori of Ghazni purchased him as his slave. Aibak later made his way up and even oversaw the attacks on India after the Second battle of Tarain.