The correct answer is A-3, B-2, C-1, D-4. Key Points ​There are 7 cities located on the banks of River Yamuna. ​Allahabad, Kaushambi, Hamirpur, Bateshwar, Agra, Vrindavan, and Mathura. There are 2 cities located on the banks of River Rapti. ​Gorakhpur and Barhaj. There are 3 cities located on the banks of River Gomti. ​Jaunpur, Sultanpur, and Lucknow. There are 4 cities located on the banks of River Saryu. ​Ayodhya, Gola, Badhalganj, and Barhaj. Important Points Yamuna River: ​​The Yamuna River is the largest tributary of the Ganges River. It originates from a place called Yamunotri (30 km north of Uttarkashi, in Garhwal) and joins the Ganges at Prayag (Allahabad). Its major tributaries are Chambal, Sengar, Chhoti Sindh, Betwa, and Ken. Total length: 1376 km. Rapti River: It originates from Rukumkot, located in the Southern part of the Dhaulagiri range, Nepal. It falls into the Ghaghra River near Barhaj. Its main tributary is Rohini. Total length: 600 km. Gomti River: It originates from Gomat Taal near the marshy area of ​​Pilibhit. It joins the river Ganga near Ghazipur. Its main tributary is the Sai River. Total length: 475 km. Saryu River: It originates from a place called Sarmool near Nanda Kot Parvat located in the northern part of the Bageshwar district in Uttarakhand. It falls into the Kali River near Nepal. Total length: 350 km. Additional Information There are 10 cities located on the banks of the Ganga River. Ghazipur, Varanasi, Mirzapur, Allahabad, Kanpur, Farrukhabad, Kachla, Sauron, Rajghat, and Garhmukte-shwawr.