Ali ibn Nafi' is also known as 'Ziryab' (or 'Blackbird', because of his beautiful voice). He was a gifted pupil of a famous musician from Baghdad, and it was his talent for music that led him to Cordoba in the ninth century CE. He was the guest of the Umayyad ruler there.
Ali ibn Nafi' is known as 'Blackbird' because ------- .
a) his voice was beautiful
b) he was a gifted pupil
c) he was the guest of the Umayyad ruler
d) he had a talent for music
