Diwan-i-Amir-i-Kohi (Department of Agriculture) created by

Diwan-i-Amir-i-Kohi (Department of Agriculture) created by
     a) Alauddin Khalji
     b) Jalaluddin Khalji
     c) Mohammad Bin Tughluq
     d) Qutbuddin Aibak

Ans: ( c )