Option d is the correct answer Ain-ul-Mulk Multani did not serve under Iltutmish. Beginning his career under Alauddin Khalji, Ain-ul-Mulk Multani served under rulers like Muhammad Bin Tughluq and Firuz Tughluq during the medieval Delhi Sultanate. His governance, diplomacy, and loyalty during power shifts, along with his writings detailing Punjab's towns and routes, underscore his historical contributions.