The correct option is D All of the above
Firoz Shah Tughlaq took a number of significant steps during his reign. He set up employment bureau, marriage bureau, built public hospitals. He also set up a department of public works which repaired old monuments and build new ones. Many new cities like Firozpur, Hissar-i-Firoza among others were built during his reign. He also established a charity department called Diwan-i-Khairat. A water clock and a sun clock were also constructed during his reign.