Exclusive: The film based on Jainism, where 'Drona' became 'Raja,' why did the film face a legal case?

Surendra Pal had portrayed the role of Dronacharya excellently in BR Chopra's Mahabharat. He shares his experience from the time of Mahabharat and recites Dronacharya's dialogues. But why wasn't he supposed to play the role of Dronacharya? And why couldn't he get the role of Arjun? Watch the full video to find out.