Question: The thriller film 3 gained high anticipation due to the viral marketing of what song that was written and sung by Dhanush, and composed by Anirudh Ravichander?
Sentence (from "3 (2012 Tamil film)"): 3 is a 2012 Indian Tamil romantic-psychological thriller film written and directed by Aishwarya R. Dhanush in her directorial debut.
Relevant evidence: Yes