Correct Answer: Andhra Pradesh

Solution : The correct option is Andhra pradesh.

The Nallamal Hills, situated in the state of Andhra Pradesh, are not only known for their scenic beauty but also for their significant biodiversity and the role they play in the region's hydrology. The Nallamal Hills are a critical part of the watershed system in Andhra Pradesh. They are the catchment area for several important rivers, including the Krishna and Godavari rivers. These rivers originate in the hills and flow through the surrounding plains, providing essential water resources for irrigation, drinking water, and other human activities.