Trinamool Congress supremo Mamata Banerjee, who was sworn-in as West Bengal's chief minister for the second time, was on Friday accorded a ceremonial welcome by Kolkata Police at Nabanna, the temporary state secretariat in neighbouring Howrah.Police presented Banerjee a guard of honour as she arrived at Nabanna to again take charge of the affairs of the state. A signage of 'Swagatam' (welcome) and shower of rose petals greeted the TMC leader as she stepped inside the glossy blue-and-white building, nearly an hour after she personally saw off each of her guests who attended her swearing-in at the Indira Gandhi Sarani (erstwhile Red Road) in central Kolkata.A cheerful Banerjee, ringed by her security detail, including top officials of Kolkata Police, was presented a bouquet of flowers and led to a green-carpeted dais inside the modernist building as she arreived to assume office for her second term.Draped in a white saree and an oversized stole, the Trinamool Congress supremo saluted and folded her hands in a 'namaste' during the guard of honour ceremony.