Who among the following witnessed the reigns of eight Delhi Sultans?

Amir Khusrau (1253-1325) is regarded as the "father of qawwali". He was an Indian musician, scholar and poet. He was an iconic figure in the cultural history of the Indian subcontinent. He is said to have witnessed the reigns of eight Delhi Sultans from 'Ghiyasuddin Balban to Sultan Muhammad bin Tughluq'.