Correct Option: A

Quwwat-ul-Islam mosque (Might of Islam) (also known as the Qutub Mosque or the Great Mosque of Delhi) was built by Qutb-ud-din Aibak, founder of the Mamluk or Slave dynasty. It was the first mosque built in Delhi after the Islamic conquest of India and the oldest surviving example of Ghurids architecture in Indian subcontinent.