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"?

Context articles: Mera Naam Joker
Sanjeev Kumar
Chandan Arora
Rishi Kapoor
Pati Patni Aur Woh (TV series)
Pati Patni Aur Tawaif
19th Filmfare Awards
Aag (1948 film)
Main, Meri Patni Aur Woh
Pati Patni Aur Woh

Mera Naam Joker (translation: "My Name is Joker") is a 1970 Indian Hindi drama film directed by Raj Kapoor.
 The screenplay was written by Khwaja Ahmad Abbas.
 This film was the debut of Rishi Kapoor.
 "Mera Naam Joker" is a film about a clown who must make his audience laugh at the cost of his own sorrows.
 The film is considered to be one of the lengthiest films of Indian cinema.
 After "Sangam" became a blockbuster, "Mera Naam Joker" was highly anticipated as it was under production for six years and was heavily publicized to be loosely based on Raj Kapoor's own life.
 Upon release the film turned out to be a critical and commercial disaster putting Kapoor into a financial crisis.
 The film was heavily panned for its length and plot.
 However, over the years, the film has gained a cult status and is regarded as a classic today.
 Both audience's and critics' response has turned highly favorable with the passage of time.
 An abridged version was released in the 1980s and had a highly successful run at the box office.
 Raj Kapoor termed this his favorite film and described it as having deep philosophical depth and meaning.
 The film is regarded as one of Kapoor's finest works today with film experts labeling it as a 'misunderstood masterpiece'.
Sanjeev Kumar (born Harihar Jethalal Jariwala 9 July 1938 – 6 November 1985) was a noted Indian film actor.
 He won several major awards including two National Film Awards for Best Actor for his performances in the movies "Dastak" (1971) and "Koshish" (1973).
 He acted in genres ranging from romantic dramas to thrillers.
 Kumar did not mind playing roles that were non-glamorous, such as characters well beyond his age.
 Movies like "Arjun Pandit", "Sholay" and "Trishul", along with the remakes of Tamil films into Hindi like "Yehi Hai Zindagi", "Naya Din Nayi Raat", "Devta", and "Ram Tere Kitne" exemplify his talents.
 He also did suspense-thriller films like "Qatl", "Shikar", "Uljhan" and "Trishna".
 Kumar also proved his ability to do comedy in films like "Manchali", "Itni Si Baat", "Pati Patni aur Woh", "Angoor", "Biwi O Biwi" and "Hero".
 He is well remembered for his versatility and genuine portrayal of his characters.
Chandan Arora is an Indian film editor and director in Bollywood, most known for his films, "Main, Meri Patni Aur Woh" (2005) and recent release, "Striker" (2010).
 He also won the Filmfare Award for Best Editing for "Company" in 2003.
Rishi Kapoor (born 4 September 1952) is an Indian film actor, producer and director known for his works in Hindi cinema.
 He received the National Film Award for his debut role as a child artist in his father Raj Kapoor's 1970 film "Mera Naam Joker" (1970).
 Kapoor had his first lead role as an adult opposite Dimple Kapadia in 1973 with the film "Bobby" and received the Filmfare Best Actor Award in 1974.
 "Bobby"' s worldwide success launched him as a global movie star, domestically in India and overseas in the Soviet Union.
Pati Patni Aur Woh is an Indian reality television programme.
 It is the Indian version of "The Baby Borrowers".
 On the programme 1000 celebrity couples were tested in parenting.
Pati Patni Aur Tawaif [English: Husband, Wife and prostitute] is a 1990 Hindi-language Indian feature film directed by Rajkumar Kohli, starring Mithun Chakraborty, Salma Agha, Farha Naaz and Om Prakash.
 It is a remake of Pakistan's 1988 Urdu language movie "Bazar-e-Husn", based on Premchand's novel Bazaar-e-Husn.
 Salma Agha reprised her role from "Bazar-e-Husn" in "Pati Patni Aur Tawaif".
The 19th Filmfare Awards were held in 1972, honoring the best in Hindi films in the year 1971.
 Hrishikesh Mukherjee's Anand was named the Best Film of the Year, while Raj Kapoor's Mera Naam Joker won as Best Director.
Aag (Hindi: आग ; English: "Fire" ) is a 1948 Bollywood film which is produced, directed by and stars Raj Kapoor.
 The film marked the debut of Raj Kapoor as producer and director and was the first film produced by his R.K. Banner.
 Nargis, Premnath, Nigar Sultana and Kamini Kaushal also starred in supporting roles.
 Raj Kapoor's youngest brother Shashi Kapoor appeared as a child artist in this film playing the younger version of his character (Kewal).
 This was the first film in which Raj Kapoor and Nargis appeared together.
Main, Meri Patni Aur Woh (English: Me, My Wife and He) is a 2005
Pati Patni Aur Woh (English: "The Husband, Wife And Mistress") is a 1978 Hindi movie produced and directed by B. R. Chopra.
 The film stars Sanjeev Kumar, Vidya Sinha, Ranjeeta Kaur, and in guest appearances Rishi Kapoor, Neetu Singh and Parveen Babi.