The correct answer is: b) Manas.
Manas National Park is a UNESCO World Heritage Site located in the eastern Indian state of Assam. It is one of the most important protected areas in the world for the conservation of the Asian one-horned rhinoceros. The park is also home to a wide variety of other wildlife, including tigers, elephants, leopards, and deer.
Dibru-Saikhowa National Park is a biosphere reserve located in the eastern Indian state of Assam. It is the largest protected area in the state and is home to a wide variety of wildlife, including tigers, elephants, rhinoceroses, and deer.
Nameri National Park is a biosphere reserve located in the eastern Indian state of Assam. It is home to a wide variety of wildlife, including tigers, elephants, rhinoceroses, and deer.
Dehing Patkai Biosphere Reserve is a biosphere reserve located in the eastern Indian state of Assam. It is home to a wide variety of wildlife, including tigers, elephants, rhinoceroses, and deer.
The four biosphere reserves in Assam are all important for the conservation of wildlife and the environment. However, only Manas National Park is a UNESCO World Heritage Site.