Which Sufi's saint dargah is at Ajmer?

Khwaja Moinuddin Chsiti

The correct answer is Option 2- Khwaja Moinuddin Chsiti

The Sufi saint dargah at Ajmer is the dargah of Khwaja Moinuddin Chishti.

Khwaja Moinuddin Chishti was a Persian Sufi saint who came to India in the 12th century. He was a highly revered figure, and his dargah in Ajmer is one of the most important pilgrimage sites for Muslims in India. It is also visited by people of other faiths, as Khwaja Moinuddin Chishti is known for his message of love and tolerance.

The other Sufi saints on your list have dargahs in different locations:

• Nizamuddin Aulia: Nizamuddin Dargah, Delhi
• Mir Mukhtar Akhyar: Mir Mukhtar Akhyar Dargah, Delhi
• Syed Waheed Ashraf: Syed Waheed Ashraf Dargah, Varanasi