The correct option is D Prithviraj Chauhan
Khwaja Moinuddin Chisti was one of the most outstanding saints of the Indian subcontinent, and an international spiritual inspiration who lived during the 6th Century AD. He arrived in Ajmer at the age of 52 years around 1190 AD during the reign of Prithviraj Chauhan. People were so much inspired by his divine teachings and simplicity that they began to embrace Islam and became his disciples.