Question: Which actor in Pati Patni Aur Woh, received the National Film Award for his debut role as a child artist in his father Raj Kapoor's 1970 film "Mera Naam Joker"?
Sentence (from "Aag (1948 film)"): Nargis, Premnath, Nigar Sultana and Kamini Kaushal also starred in supporting roles.
Relevant evidence: No