The correct option is C Bhagirathi-Hooghly
The River Ganga, combined with the flow of its tributaries, moves to the east towards the town of Farakka. The river from here divides into 2 branches. The major branch enters Bangladesh and is joined by the Brahmaputra. Further downstream, it is known as the Meghna. The other distributary of the Ganga, known as the Bhagirathi-Hooghly, flows southwards through the deltaic plains and also drains into the Bay of Bengal.