Question: Who directed and composed music for the 2006 film that K. J. Singh won a National Film Award for Best Audiography for?
Sentence (from "Omkara (2006 film)"): It starred Ajay Devgan, Saif Ali Khan, Vivek Oberoi and Kareena Kapoor in the lead roles, supported by Naseeruddin Shah, Konkona Sen Sharma and Bipasha Basu.
Relevant evidence: No