Concept:Manas National Park is a renowned wildlife sanctuary known for its biodiversity, located in the Indian state of Assam. Explanation:Manas National Park lies in the Himalayan foothills of Assam, sharing a border with Bhutan's Royal Manas National Park. It is designated as a biosphere reserve, Project Tiger reserve, UNESCO World Heritage Site, and elephant reserve. The park shelters rare endemic species such as the pygmy hog, golden langur, hispid hare, and Assam roofed turtle. It also hosts a large herd of wild water buffalo. Originally declared a sanctuary in 1928, the park was expanded in the 1950s and recognized as a UNESCO World Heritage Site in 1985. These facts confirm its location in Assam. Answer:C. Assam