Answer: Nabanna
Notes: The play Nabanna in 1944 is said to be the birth of group theatres in Kolkata. Nabanna was written by Bijon Bhattacharya, who also co-directed it with Sambhu Mitra. They were both active members of the Indian People's Theatre Association, the association of leftist theatre-artists. In the commercial theatres at that time, entertainment was the sole purpose.
