Chetna is a 1970 Bollywood action film directed by B.R. Ishara. The film stars Shatrughan Sinha, Anil Dhawan, and Rehana Sultan. The film focuses on the subject of rehabilitation of prostitutes. However, the film is more famous for its bold scenes of the actress Rehana Sultan. The film virtually ended the film career as she was typecast thereafter. One of its songs, "Main To Har Mod Par Tujhko Doonga Sada," is singer Mukesh's all-time memorable and popular song.