This Geeta Dutt tune from the 1956 film Bhai Bhai featured music composed by Madan Mohan. It was his first hit. The film ran for 24 weeks. It would have gone on to a silver jubilee run, but a dispute between the director and the producer scotched that hope.
I’m fairly certain that the Goan trumpet player Chic Chocolate was his assistant, even though he isn’t mentioned in the credits. That would explain why the melodic inspiration for the tune, and a direct quotation that starts from 1.51, are from this classic Portuguese fado, Coimbra, performed here by the diva Amalia Rodrigues as April in Portugal. It’s a tune that Chic Chocolate would most likely have heard in his home state, which was still a Portuguese colony when Bhai Bhai was made (and would remain one for five more years).
Chic Chocolate styled himself as “India’s Louis Armstrong” and, for what it’s worth, here’s a version of April in Portugal by “America’s Chic Chocolate”.