Which one of the following statements is correct?

1. (a)‘Neel Darpan’ was a play based on the exploitation of the indigo farmers
2. (b)The author of the play ‘Ghashiram Kotwal’ is Vijay Tendulkar
3. (c)The play ‘Navanna’ by Nabin Chandra Das was based on the famine of Bengal
4. (d)Urdu theatre used to depend heavily on Parsi theatre