<Tr> <Th> Country </Th> <Td> India Bangladesh </Td> </Tr> <Tr> <Th> States </Th> <Td> Uttarakhand, Uttar Pradesh, Bihar, Jharkhand, West Bengal </Td> </Tr> <Tr> <Td_colspan="2"> Tributaries </Td> </Tr> <Tr> <Td> - left </Td> <Td> Ramganga, Gomti, Ghaghara, Gandak, Koshi, Mahananda </Td> </Tr>

Which one of the following river is not the tributary of ganga