Trinamool Congress Friday called its MP Dinesh Trivedi ungrateful after he resigned from the Rajya Sabha, while a jubiliant BJP quickly extended its welcome to him to join the saffron camp. Trivedis resignation came amidst the exodus from Mamata Banerjees party ahead of the West Bengal assembly poll. An angry TMC lashed back at Trivedi, who had been maintaining distance with the party for the last two months, saying he has betrayed the party leadership and the trust of the people. Trivedi, a former railway minister and two-time Lok Sabha MP, was sent to Rajya Sabha last year by TMC after losing the parliamentary polls in 2019. He is reported to have had some issues with a senior Rajya Sabha member of the party for the past few months. Reacting to the development TMC Rajya Sabha deputy leader Sukhendu Sekhar Roy said Trivedi is ungrateful. For the last so many years he (Trivedi) did not say anything. Now all of a sudden just months before the state assembly poll he has complaints. This shows his true colours, Roy said. He is ungrateful and has betrayed the trust of the masses, Roy added. Echoing him, party colleague and Lok Sabha MP Sougata Roy said People like Trivedi enjoy power during their tenure and leave at the time of elections. If he had grievances, he could have aired it in the party. An elated BJP said The beginning of the end of the TMC has already begun. Claiming that the party will disintegrate soon, state BJP president Dilip Ghosh said It is only a matter of time before TMC disintegrates. If Dinesh Trivedi wants to join us, we will welcome him. BJP national general secretary and the partys Bengal minder Kailash Vijayvargiya lauded Trivedi as a good leader who was feeling suffocated in a party like TMC. Trivedi is the fourth senior TMC leader to quit the ruling party in West Bengal in the last two months after Suvendu Adhikari and Rajib Banerjee, who had switched over to the BJP and Laxmi Ratan Shukla, who had expressed his desire to quit politics. This wass not the first time that Trivedi had openly aired his grievances against the party. Earlier in March 2012, he had to step down as Railway Minister after Mamata Banerjee, who is also the TMC supremo, had opposed the railway budget placed by him. He was replaced with the then TMC general secretary Mukul Roy. Trivedi was also suspended from the party but was later reinstated. Resigning from the Rajya Sabha, he had said If you sit here quietly and cannot do anything, then it is better that you resign from here and go to the land of Bengal and be with people. What I mean to say is the way violence is taking place in our state. Sitting here, I am feeling perplexed as to what should I do, he had added.