Which among the following departments created by Allauddin Khilji to enquire into the revenue arears and to collect them?

Q. Which among the following departments created by Allauddin Khilji to enquire into the revenue arears and to collect them?
Answer: Diwan-i-Mustakhraj
Notes: Allauddin Khilji created new department viz. Diwan-i-Mustakhraj to enquire into the revenue arears and to collect them.