Option d is the correct answer. Amir Khusrau was a Persian poet, musician, and scholar who lived in Delhi during the 13th and 14th centuries CE. He was not associated with the Bhakti movement. He was a disciple of Nizamuddin Auliya, a famous Sufi saint, and composed many poems and songs in praise of him. He also wrote in Persian, Arabic, Hindi, and Urdu languages, and is regarded as the father of Qawwali music.