Correct Answer: (b) Ghiyasuddin Balban
Note: Amir Khusrau was associated with the courts of various Delhi ruler, i.e., Nasiruddin Mahmud, Balban, Kaiqubad, Samsuddin Kayumars Jalaluddin Khalji, Alauddin Khalji, Shihabuddin Umar, Mubarakshah, Ghiyasuddin Tughluq and Muhammad-Bin-Tughluq. He was the disciple of a Sufi saint Nizamuddin Auliya. Miftah-ul-Futuh, Khazain-ul-Futuh (Tarikh-i-Alai), Ashika, Nuh Sipihr, TughluqNama etc. are some of the masterpieces written by him. Amir Khusrau was the court poet of Alauddin Khalji.