Which one of the following is not a tributary of the river Ganga?

Tributaries -

left:

Ramganga, Gomti, Karnali, Gandaki, Koshi, Mahananda

-

right:

Yamuna, Tamsa, Son, Punpun, Tons, Hindon, Kunta, Gir, Rishiganga, Hanuman Ganga, Sasur Khaderi

 

Sharda:

flows southeast another 100 km (62 mi) in Uttar Pradesh to join the Ghaghra (Karnali) as a right - bank tributary. Teesta is a tributary of Jamuna river.