Which of the following rulers introduced the iqta system in India?

The correct answer is Option (2) → Iltutmish

Under the iqta system, the Sultan assigned the revenue of a territory to a military officer (iqtadar or muqti), who collected it as his salary and maintained troops in return. Iltutmish (1211–1236) set up this system as a regular part of the Delhi Sultanate’s administration.