That song "Baag mein kali khili" was composed by Salil Choudry, If I am not mistaken, for a Bengali movie, then used in a Malayalam movie and then in Hindi Movie.
Not too sure, but i do remember reading something like this 😳
Very true. Many of Salilda's compositions have been used by him in Bengali/Malayalam/Hindi films.
Offhand I remember 'Jeyte Jeyte..(Bengali/Hemant Kumar)/ Koi hota jisko apna(Hindi-KK)" and "Ejbon..(Bengali-Hemantkumar)/Haal chaal thika thak hai(Hindi-Manna Dey & others)"