The Oscar-winning music composer from Tamil Nadu is:

A.R. Rahman
Ilaiyaraaja
M.S. Viswanathan
Yuvan Shankar Raja

The correct answer is A.R. Rahman.

A.R. Rahman is an Indian film composer, musician, singer, songwriter, music producer, and philanthropist who works in Tamil, Hindi, Telugu, Malayalam, Kannada, Bengali, Odia, Assamese, English, and Arabic film industries. He is known for his work in a variety of genres, including film music, classical music, pop music, and jazz.

Rahman has won six National Film Awards, two Academy Awards, two Grammy Awards, a Golden Globe Award, a BAFTA Award, and fifteen Filmfare Awards. He is the first Indian to win an Academy Award, a Grammy Award, and a BAFTA Award. He is also the first Indian to win a Golden Globe Award for Best Original Score.

Rahman was born in Chennai, Tamil Nadu, India, on January 6, 1967. He began his career as a keyboard player in the 1980s. He made his debut as a film composer in 1992 with the Tamil film Roja. He went on to compose music for over 100 films, including Roja (1992), Bombay (1995), Dil Se (1998), Taal (1999), Lagaan (2001), Rang De Basanti (2006), Slumdog Millionaire (2008), 12 Years a Slave (2013), and Lion (2016).

Rahman has also released several albums, including Vande Mataram (1997), Spirit of India (2001), and Kelucharan (2006). He has also composed music for several television shows and commercials.

Rahman is a recipient of the Padma Shri, the fourth highest civilian award in India. He is also a recipient of the Padma Vibhushan, the third highest civilian award in India. He was awarded the Legion of Honour, the highest civilian award in France, in 2017.

Rahman is a global icon and one of the most successful Indian musicians of all time. He is a pioneer in the field of film music and has made a significant contribution to the Indian music industry.