Correct Option: C

Firoz Tughlaq, Sultanate rulers himself encouraged bribery in administration. Sultan Feroze Shah Tughlaq's reign has been described as the greatest age of corruption in medieval India. It can be imagined from the fact that Sultan Feroze Shah Tughlaq once gave a golden Tanka to a distraught soldier so that he could bribe the clerk to pass his substandard horse. The case of Imadulmulk Bashir, the minister of war who began his career as an inherited slave of Sultan Firoz Shah Tughlaq, in course of his service is said to have accumulated wealth to the tune of thirteen crores, when the state's yearly income was six crores and seventy-five lakh Tankas.