Pick the odd man out of the following members of the subaltern group :

Ranajit Guha founded Subaltern Studies in 1982, and Partha Chatterjee and Dipesh Chakrabarty remained central members of the collective. Sumit Sarkar contributed to the early volumes but broke away and criticised the group's later turn to postcolonial cultural theory in his essay 'The Decline of the Subaltern in Subaltern Studies' (1997). He is therefore the odd one out.