_ Under which Delhi Sultan's rule, was the Kharaj in the form of a proper land tax levied over large parts of northern India?$?

_ Under which Delhi Sultan's rule, was the Kharaj in the form of a pro

1.	_ Under which Delhi Sultan's rule, was the Kharaj in the form of a proper land tax levied over large parts of northern India?$?
A.	Firoz Shah Tughluq
B.	Alaudin Khilji
C.	Qutbuddin Aibak
D.	Mahmood Shah
Answer» C. Qutbuddin Aibak