The Trinamool Congress on Wednesday dissolved all its committees and organisations in West Bengal.The Mamata Banerjee-led party said that it will conduct a “comprehensive exercise of introspection”, performance review and organisational assessment in the wake of its electoral defeat in the state.The structure of the party and its units will be reconstituted based on the findings of the review, it said.On May 4, the Bharatiya Janata Party defeated the TMC in the Assembly elections, ending its 15-year rule in the state.Division within the TMCOn Wednesday, expelled TMC MLA Ritabrata Banerjee reached the Assembly with 59 of the party’s 80 MLAs, who are supporting his attempt to become the leader of the Opposition in the House, The Indian Express reported.Ritabrata Banerjee’s decision is being viewed as a challenge to party chief Mamata Banerjee, who is supporting Sovandeb Chattopadhyay to be the Opposition leader in the Assembly.The group of MLAs submitted, without the party’s letterhead, a list mentioning Mamata Banerjee as the party’s leader, Ritabrata Banerjee as the leader of the Opposition, and Sheuli Saha, Javed Khan, Sandipan Saha and Sabina Yasmin as the deputy leaders in the House, the newspaper reported.This came a day after TMC’ National General Secretary Abhishek Banerjee on Tuesday sent a fresh letter to Speaker Rathindra Bose reiterating the party’s decision to appoint Chattopadhyay as leader of the Opposition.This came amid a probe into an alleged case of signature forgery and speculation about divisions within the TMC’s legislature party after Ritabrata Banerjee and another MLA Sandipan Saha were expelled on Monday.The two MLAs had alleged that signatures were forged in documents submitted to the speaker in support of Chattopadhyay’s appointment.Edited by Neerad Pandharipande.