He joined the Communist Party of India in 1931 and went to work for them full - time in 1938 .
As a student at the age of thirteen , Mukherjee joined the Indian freedom movement , joining the Indian National Congress party in 1924 .
Mukherjee joined the Communist Party of India in 1931 and went to work for them full - time in 1938 .
As a student at the age of thirteen , Mukherjee joined the Indian freedom movement , joining the Indian National Congress party in 1924 .