Nagavali River forms a prime river of north eastern Andhra Pradesh and southern Odisha. The origin of Nagavali River lies in the eastern slopes of the Eastern Ghats near Lakhbahal, located at an altitude of 1,300 metres in the Kalahandi district of the Indian state Odisha. Hence option 2 is correct. Vamsadhara river rises in the Eastern Ghats on the border Kalahandi district and Rayagada district of Odisha. It runs for a distance of about 254 kilometers, where it joins the Bay of Bengal at Kalingapatnam, Andhra Pradesh. Hence option 4 is correct.