Who among the following Indian musicians received the 'Best Original Song' award for his composition in 'Slumdog Millionaire', at Oscars 2009?

AR Rahman

The correct answer is Option (1) - AR Rahman

AR Rahman, the renowned Indian musician, composer, and singer, won the Oscar for 'Best Original Song' in 2009 for his composition "Jai Ho" in the film "Slumdog Millionaire." This achievement marked a significant milestone in Indian cinema, as Rahman became the first Indian to win two Oscars in a single night, having also won the award for 'Best Original Score' for the same film. "Jai Ho" went on to become a global sensation, further solidifying Rahman's status as one of the most influential musicians in the world.