Kolkata, May 20 (ANI): With Mamata Banerjee led government completing one year in office, the Trinamool Congress Party (TMC) lawmaker Derek O'Brien told reporters that the government's first year in power had benefited all sections of the society, in West Bengal. Congress party, however, sounded a note of refutation amidst the celebratory mood, citing that the TMC's claim of keeping all its promises was redoubtable. The TMC, came into power in 2011, ending over three decades of Communist rule in West Bengal.