What is the invention of the social entrepreneur whose life is the subject of an upcoming 2018 Indian film called 'Padman' ?
Padman: Padman is an upcoming 2018 Indian Hindi comedy-drama film featuring Akshay Kumar, Sonam Kapoor and Radhika Apte in lead roles. Padman:  The film is inspired from the life of Arunachalam Muruganantham.
i don't know