Which Bollywood film directed by Raj Kapoor is set in a Circus and stars Raj Kapoor and Nargis, and is known for its themes of love, sacrifice, and social commentary?
Correct: C
None of the above options exactly match the description provided. However, the closest match is C. Mera Naam Joker, a film directed by Raj Kapoor and starring Raj Kapoor, which explores themes of love, sacrifice, and social commentary, but is set in the context of a Circus-like setting in the sense that the protagonist is a clown. Another film 'Shree 420' is set in a Circus for some scenes. Hence the description provided doesn't exactly match any film but 'Mera Naam Joker' comes closest.