The unique floating national park in Manipur is:

Nameri National Park
Kaziranga National Park
Manas National Park
Keibul Lamjao National Park

The correct answer is: d) Keibul Lamjao National Park.

Keibul Lamjao National Park is a national park in Manipur, India. It is the only floating national park in the world. The park is home to a variety of wildlife, including the endangered sangai deer. The park is also home to a number of plant species, including the endangered Manipuri rhododendron.

Nameri National Park is a national park in Assam, India. The park is home to a variety of wildlife, including tigers, elephants, and rhinoceroses. The park is also home to a number of plant species, including the endangered Assamese macaque.

Kaziranga National Park is a national park in Assam, India. The park is home to a large population of one-horned rhinoceroses. The park is also home to a variety of other wildlife, including tigers, elephants, and deer.

Manas National Park is a national park in Assam, India. The park is home to a variety of wildlife, including tigers, elephants, and rhinoceroses. The park is also home to a number of plant species, including the endangered Manas rhododendron.