Q. Where does the Northern Koyal River of Jharkhand originate?
Answer: Ranchi Plateau
Notes: The Northern Koyal River originates from the Ranchi Plateau in Jharkhand, specifically at Chulha Pani in Lohardaga district. The Ranchi Plateau is part of the larger Chhota Nagpur Plateau but is a more precise location for the river's source. The river flows through Latehar district and eventually joins the Son River near Haidarnagar. The Deoghar Plateau is not the source of this river.