Nizamuddin Auliya is the defensible answer to this advanced Medieval History question. Poet and musician Amir Khusrau was closely attached to Nizamuddin Auliya of Delhi and became one of the most celebrated cultural figures linked with his circle. Region, language, chosen deity, institutional setting and attitude to ritual help distinguish one saint or order from another. The distractors need separate rejection: Muinuddin Chishti belongs to a different institution, context or chronology; Bahauddin Zakariya does not perform the function described in the stem; and Shaikh Ahmad Sirhindi fails the required association. The wording of “Amir Khusrau was a devoted disciple of which Chishti saint?” is deliberately specific, so the candidate should isolate its operative clue before recalling names. — Nizamuddin Auliya”, but also remember the factual reason stated above.