Answer-What was 'Diwan-i-Istihaq' in the Sultanate period?

In the Sultanate period, Diwan-i-Istihaq was a pension department established by Firoz Tughluq, its function was to give stipends to retired employees or to help the dependents of soldiers killed in military campaigns. Diwan-e-Khairat was the charity department by Firoz Tughlaq. The Diwan-i-Amirkohi was an agricultural department established by Muhammad bin Tughlaq. Diwan-i-Risalat was a foreign department.