The correct option is D Iltumish
It was widely believed that the rule of a just king would be an age of plenty when the heavens would not withhold rain. At the same time, making precious water available by constructing tanks and reservoirs was highly praised. Sultan Iltutmish won universal respect for constructing a large reservoir just outside Dehli-i kuhna. It was called the Hauz-i Sultani or the Kings Reservoir.