Q. Which river originates from the Rajmahal hills in Jharkhand?
Answer: Gumani
Notes: The Gumani river originates from the Rajmahal hills in Jharkhand. Rajmahal hills are located in the Santhal Pargana division and span about 2,600 km² with average elevations of 200-300 meters. Other rivers like Auranga, Sankh, and Punpun originate from different locations within Jharkhand and not from the Rajmahal hills.