Premise: Khatarnaak is a 1990 Hindi-language Indian feature film directed by Bharat Rangachary, starring Sanjay Dutt, Farha Naaz and Anita Raj in lead roles, upon release the film was a box office hit. Film's track " Aasmaan pe baithi Chandani" music is uncredited copy of B.J. Thomas's track "Raindrops keep falling on my head ."
Hypothesis:  Sanjay Dutt, Farha Naaz and Anita Raj have featured together in several films.