Who among the following Sultans organized the Iqta system, a regular standing army, official coinage, and consolidated the early administrative organs of the Delhi Sultanate?

Shamsuddin Iltutmish ($1211\text{–}1236$) consolidated the loosely held territories of the Slave Dynasty into a functional state. He introduced the institutionalized Iqta system, formed a centralized army, and introduced the standard silver Tanka and copper Jital coins, making him the real consolidator of the Sultanate.