Question

which Delhi sultans maintained chihalgani?

Answer 1

Iltutmish maintained chihalgani.

Answer 2

Shams ud-Din Iltutmish is the right answer.

Iltutmish introduced a system of nobles in India during his reign. He formed this group once his empire began to face the regular attack of Mongols. This group consisted of 40 loyal slaves Amirs, who were known as the Turkan-i-Chihalgani. this group was very persuasive and became the de facto kings behind the majority of his successors.