In 1926, before entering
Allahabad University, Ghosh met
Bhagat Singh and
Batukeshwar Dutt. He was a member of
Hindustan Socialist Republican Association. He was arrested and later imprisoned after
Lahore Conspiracy Case trial in 1929 but released due to lack of evidence. He was again arrested in 1931 and came into contact with Srinivas Sardeshai in
prison. After release, he joined in the
Communist Party of India. In 1934, he was elected to the Central Committee of the
CPI and in 1936 he was elected to its Polit Bureau. In 1938, Ghosh became the member of the editorial board of the Party's mouthpiece, the
National Front. He was the General Secretary of the Communist Party of India from 1951 till his death in 1962. He was leading the Communist Party of India during the
China-India war in 1962. He was the prominent person in the centrist faction before the
split of the
Communist Party of India (Marxist) from the
Communist Party of India. ==References==