Question

The largest standing army of the sultanate, directly paid by the state was created by

Answer 1

The largest standing army of the Delhi Sultanate directly paid by the State was created by Balban, Illutmish, and Muhammed-bin-Tughluq.

This is consider as largest standing arm and thus directly paid by the state was created. It is created by these three members and consider by largest standing army of the Sultanate.