The correct answer is B. Bajrangi Bhaijaan.
Bajrangi Bhaijaan is a 2015 Indian Hindi-language action comedy film directed by Kabir Khan and produced by Salman Khan, Kabir Khan, and Rockline Venkatesh. The film stars Salman Khan, Kareena Kapoor Khan, and Harshaali Malhotra. The film tells the story of a man who helps a mute Pakistani girl return to her home in Pakistan.
The film was a critical and commercial success. It was the highest-grossing Indian film of 2015 and the third highest-grossing Indian film of all time. It won two National Film Awards, including Best Popular Film Providing Wholesome Entertainment.
The other options are incorrect.
A. Piku is a 2015 Indian Hindi-language comedy-drama film directed by Shoojit Sircar and produced by Ronnie Lahiri and Juhi Chaturvedi. The film stars Deepika Padukone, Irrfan Khan, and Amitabh Bachchan. The film tells the story of a young woman who takes her aging father on a road trip from Delhi to Kolkata.
The film was a critical and commercial success. It won two National Film Awards, including Best Actress for Deepika Padukone.
C. Bajirao Mastani is a 2015 Indian historical romance film directed by Sanjay Leela Bhansali and produced by Bhansali Productions and Eros International. The film stars Ranveer Singh, Deepika Padukone, and Priyanka Chopra. The film tells the story of the love triangle between the Maratha warrior Peshwa Bajirao I, his second wife Mastani, and his first wife Kashibai.
The film was a critical and commercial success. It won six National Film Awards, including Best Film.
D. Bahubali: The Beginning is a 2015 Indian epic historical action film directed by S. S. Rajamouli and produced by Shobu Yarlagadda and Prasad Devineni under Arka Media Works. The film stars Prabhas, Rana Daggubati, Anushka Shetty, Tamannaah Bhatia, Ramya Krishnan, Sathyaraj, and Nassar. The film tells the story of a warrior who fights to reclaim his kingdom.
The film was a critical and commercial success. It was the highest-grossing Indian film of all time until it was surpassed by Dangal in 2016. It won two National Film Awards, including Best Special Effects.