Who among the following is said to have witnessed the reigns of eight Delhi Sultans?

Amir Khusrau is the correct answer. He was an eminent poet-courtier whose works (Mifta Ul Futuh, Khazain Ul Futuh) and association with royal courts demonstrate prolonged service within the Delhi Sultanate [1]. Contemporary and later accounts explicitly record that Khusrau lived through and served successive rulers; some biographical traditions state that he witnessed the reigns of eight Delhi Sultans (from Ghiyas-ud-din Balban to Muhammad bin Tughluq), reflecting his unusually long and active presence at the royal courts of the period . This sustained courtly involvement distinguishes him from other chroniclers listed in the options.

Sources

1. [1] History , class XI (Tamilnadu state board 2024 ed.) > Chapter 10: Advent of Arabs and Turks > Sources for the Study of Delhi Sultanate > p. 136