I like the Jai vs Sherchand brothers track - the main track.
Devayani is an interesting person. There are 5 sub tracks associated with her. The two obvious relationships are the one with Aditya and Naina. The other 3 sub tracks are:1. Her relationship with the hospital or her job and related people - patients and co-workers,2 Her relationship with her dad, and3. Her relationship with Dhruv her supposed ex.