Which Sultan introduced new Department “Aamir-e- Kohi”?

The department of 'Diwan-i-Amir-Kohi' dealt with which of the following during Sultanate period?

Who created the department of Diwan-i-Arz in Delhi Sultanate?

Which of the following Sultans introduced “Market Reforms”?

Which one of the following Sultans of Delhi introduced measures for improving the quality of fruits?

'Diwan-E-Arj' department was associated with: