Question: Arjun Kapoor worked as an assistant on which film directed by Nikkhil Advani?

Context paragraphs:
India's Raw Star: India's Raw Star was an Indian singing competition series created by Gajendra Singh of Saibaba Telefilms which began airing on Star Plus from 24 August 2014.  It was hosted by model-actress Gauahar Khan and mentored by singer-rapper Yo Yo Honey Singh.  Rituraj Mohanty won the first season on 30 November 2014 with Darshan Raval and Mohit Gaur finishing second and third respectively.  The other contestants were Sagar Bhatia, Akasa Singh, pardeep singh sran etc.  Arjun Kapoor and Himesh Reshammiya made guest appearances in the show.  "India's Raw Star"' witnessed singers like Kailash Kher, Mohit Chauhan and Shaan perform in the final episode with finalists Rituraj, Mohit and Darshan.  The finalists sang the final face off song composed by Sachin and Jigar on the occasion, while Arjun Kapoor, promoted his film "Tevar".

Rhea Kapoor: Rhea Kapoor is an Indian film producer.  The younger daughter of actor Anil Kapoor and his wife Sunita, she is the sister of actors Sonam Kapoor and Harshvardhan Kapoor, granddaughter of filmmaker Surinder Kapoor, niece of filmmaker Boney Kapoor and his wives, producer Mona Shourie Kapoor and actress Sridevi, and actor Sanjay Kapoor.  Her cousins are actors Arjun Kapoor and Mohit Marwah.  She produced Rajshree Ojha's film "Aisha", which starred her sister Sonam and Abhay Deol in leading roles.  She has also produced "Khoobsurat", directed by Shashanka Ghosh, which is an official remake of Hrishikesh Mukherjee directed film by the same name.

Boney Kapoor: Boney Kapoor (born Achal Kapoor on 11 November 1953) is an Indian film producer who has produced numerous Bollywood films like "Mr. India", "No Entry", "Judaai" and "Wanted" to his credit.  He is the elder brother of actors Anil Kapoor and Sanjay Kapoor and father of popular actor Arjun Kapoor.

Nikkhil Advani: Nikkhil Advani (born 28 April 1971) is an Indian film producer, director and screenwriter.  He is one of the co-founders of Emmay Entertainment, a motion picture production company.  Nikkhil has worked with famed ecologist Bittu Sehgal and he serves on the advisory board of Save The Tiger’s cause.

Arjun Kapoor: Arjun Kapoor (] ; born 26 June 1985) is an Indian actor who appears in Bollywood films.  He is the son of film producers Boney Kapoor and Mona Shourie Kapoor.  After working as an assistant director and associate producer on several films, including "Kal Ho Naa Ho" (2003) and "Wanted" (2009), he made his acting debut with Habib Faisal's romantic drama "Ishaqzaade" (2012), for which he was nominated for the Filmfare Award for Best Male Debut.

Abhi Nahi Toh Kabhi Nahi: Abhi Nahi Toh Kabhi Nahi is a upcoming Bollywood movie is directed by Jyoti Kapur Das produce by Virender K.Arora and Arjun Kapoor.  The film features Pankaj Kapoor, Lara Dutta, Kay Kay Menon, Rajeev Khandelwal, Sanjay Kapoor, Pooja Chopra, Sanah Kapoor and Himansh Kohli.

Kal Ho Naa Ho: Kal Ho Naa Ho (English: "Tomorrow May Never Come"), abbreviated as KHNH, is a 2003 Indian romantic drama, directed by debutant director Nikkhil Advani.  The film was written by Niranjan Iyengar and Karan Johar and produced by Yash Johar and Karan Johar under their Dharma Productions banner.  The soundtrack for the film was composed by Shankar-Ehsaan-Loy, with lyrics written by Javed Akhtar.

Guddu Engineer: Guddu Engiineer is an upcoming Indian short film directed by Nikkhil Advani and written by Aseem Arora.  It has Prabuddh Dyma and Pranali Ghogare as leads and the short film will be released under Zeal For Unity festival.  With a run time of 42 minutes, Guddu Engiineer is categorised under the genre of Romance and Drama.

P.O.W. - Bandi Yuddh Ke: P.O.W. - Bandi Yuddh Ke is an Indian political thriller television finite series developed by Nikkhil Advani, and is loosely based on the Israeli drama "Hatufim".  The series premiered 7 November 2016 on Star Plus.  The trailer of the show was released on the official page of the channel.  Several Bollywood celebrities have praised the trailer.  The show was premiered at MAMI film fest followed by a talk with Gideon Raff, who developed "Hatufim" and served as a consultant for this series.

Baazaar: Baazaar is an upcoming 2017 crime film directed by Gauravv K. Chawla, written by Nikkhil Advani, Aseem Arora and Parveez Sheikh, and starring Saif Ali Khan and debutant Rohan Mehra in lead roles.

Supporting paragraphs: Arjun Kapoor Kal Ho Naa Ho
Answer: Kal Ho Naa Ho