Which king of the slave dynasty was an expert calligraphist and spent his leisure time copying the Quran?

Q. Which king of the slave dynasty was an expert calligraphist and spent
his leisure time copying the Quran?
(a) Balban
(b) Iltutmish
(c) Nasir-ud-din
(d) Bahram Shah
Ans: (c) Nasir-ud-din

Explanation: An intensely religious-minded person, Nasir-ud-din spent his leisure times in copying the Quran.