Correct option is D
- The correct answer is D. Assam.
- Rajiv Gandhi Orang National Park, now officially known as Orang National Park.
- It is located in the Darrang and Sonitpur districts of Assam.
- It lies on the north bank of the Brahmaputra River
- It is known for its rich biodiversity, including one-horned rhinoceroses, tigers, elephants, and pygmy hogs.
