Tum pukar lo is one of the haunting melodies written by Gulzar for the hindi movie Khamoshi in 1969 with the beautiful voice and music Hemant Kumar. The song has Bb note in the intro; however, it fits nicely in key of C (or if you prefer in F) key. I am using only two chords F and G major at various parts of the fret. I have played both F and G using D-shape in 5th fret and 7th fret respectively. It is a very quiet song. Sh………. Khamosh.