PURNEA, March 28 -- Bima Bharti, MLA from Rupauli in Purnea district of Bihar who had joined the RJD a few days ago, said Wednesday that she would file her nomination on April 3 for the Purnea Lok Sabha seat, a move that's sure to rile ally Congress which had apparently promised the seat to former MP and strongman Rajesh Ranjan alias Pappu Yadav, who also joined the party a few days ago....