Among the four alternatives, Iltutmish alone satisfies the full historical condition. The Chahalgani was an influential corps of Turkish slave-amirs consolidated under Iltutmish; later sultans struggled to curb its political power. The distractors need separate rejection: Jalaluddin Khalji belongs to a different institution, context or chronology; Qutbuddin Aibak does not perform the function described in the stem; and Balban fails the required association. The wording of “The group known as the Turkan-i Chahalgani was most closely associated with which Sultan?” is deliberately specific, so the candidate should isolate its operative clue before recalling names. — Iltutmish”, but also remember the factual reason stated above.