Find the correct match? District River a. Jamui Kosi b. Kaimur Phalgu c. Katihar Mahananda d. Khagaria Gandak

The other options are incorrect because:

• The Kosi River is a river in the Indian states of Bihar and Uttar Pradesh. It is a tributary of the Ganges River. The Kosi River originates in the Himalayas and flows through the districts of Saharsa, Supaul, Darbhanga, and Muzaffarpur in Bihar. It joins the Ganges River near Patna.
• The Phalgu River is a river in the Indian state of Bihar. It is a tributary of the Ganges River. The Phalgu River originates in the Himalayas and flows through the districts of Gaya and Nalanda in Bihar. It joins the Ganges River near Patna.
• The Gandak River is a river in the Indian states of Bihar and Uttar Pradesh. It is a tributary of the Ganges River. The Gandak River originates in the Himalayas and flows through the districts of Gopalganj, Siwan, Saran, and Muzaffarpur in Bihar. It joins the Ganges River near Patna.