This dialogue is from the 1975 film 'Chupke Chupke'. The play on words involves abbreviations: 't.o' (तो - to), 'd.o' (दो - do), and 'g.o' (गो - go). The joke asks why 'g.o' doesn't become 'goo' (गू), maintaining the pattern. 'Ruk ruk Ke', 'Chori Chori', and 'Police Public' are other films.