The Keibul Lamjao National Park is famous for the endangered:

Sangai Deer
One-horned Rhinoceros
Clouded Leopard
Hoolock Gibbon

The correct answer is Sangai Deer.

The Sangai deer is a deer species found in Manipur, India. It is the only deer species in the world with four-tined antlers. The Sangai deer is also the state animal of Manipur.

The Sangai deer is an endangered species. The main threats to the Sangai deer are habitat loss, poaching, and hunting. The Sangai deer is also susceptible to diseases such as anthrax and foot-and-mouth disease.

The Keibul Lamjao National Park is a national park in Manipur, India. The park is famous for the endangered Sangai deer. The park is also home to a variety of other wildlife, including tigers, leopards, elephants, and monkeys.

The Keibul Lamjao National Park is a Ramsar site, a wetland of international importance. The park is also a UNESCO Biosphere Reserve.

The Sangai deer is a beautiful and graceful animal. It is a shame that this species is endangered. We must do everything we can to protect the Sangai deer and its habitat.

The other options are incorrect.

The One-horned Rhinoceros is found in India, Nepal, and Bhutan. It is not found in Manipur.

The Clouded Leopard is found in Southeast Asia. It is not found in Manipur.

The Hoolock Gibbon is found in Southeast Asia. It is not found in Manipur.