A.R Rahman worked as an assitant of Ilayaraja
A
Correct answer
Explanation
A.R. Rahman began his musical career working as a keyboard player and arranger for several music directors, most notably Ilayaraja. He worked in Ilayaraja's troupe for several years before making his debut as a composer with 'Roja' in 1992. This professional relationship is a well-documented part of Indian cinema history.