Explanation:

Alaudin khilji introduced the reforms in the army and started the system of branding the horses “Dagh” and biometric information about the soldiers “Chehra”. Regular muster for army was introduced by him. He confiscated the lands granted to nobles and checked free grants of lands. He forbade them to marry among each other’s families and hold celebrations. To know about the revenue arrears and collect them, he introduced a new department of Diwan-i-mustakhraj. He is known to have established separate markets for food grains, cloths etc. He also created new posts of Diwan-i-riyasat and Shahna-i-mandi to control the markets. He organized and introduced a countrywide spy system. He was the First Sultan who set up a “permanent Standing Army” of the sultanate. He abolished the Iqta System introduced by Iltutmish and started paying them salary in cash.