In the 2010 state assembly elections, Manju Hajari of BJP won the Rosera seat defeating her nearest rival Pitamber Paswan of RJD. In the 2015 state assembly elections, Dr. Ashok Ram won from congress party in collaboration with Mahagathbandhan and defeated Manju Hajari.
In 2010, Manju Hajari of BJP won the Rosera seat against Pitamber Paswan of RJD in state assembly elections. In 2015, Dr. Ashok Ram from Congress party, with Mahagathbandhan support, defeated Manju Hajari in the same seat.