The Pobitora Wildlife Sanctuary boasts a high density of:

Tigers
One-horned rhinoceros
Wild elephants
Swamp deer

The correct answer is: b) One-horned rhinoceros.

The Pobitora Wildlife Sanctuary is a protected area in the Indian state of Assam. It is home to a high density of one-horned rhinoceroses, making it one of the best places in the world to see these animals in their natural habitat. The sanctuary also has a variety of other wildlife, including tigers, elephants, deer, and birds.

One-horned rhinoceroses are the largest land mammals in India. They are herbivores and their diet consists mainly of grasses, leaves, and fruits. Rhinos are solitary animals and they typically only come together to mate. The gestation period for a rhinoceros is about 16 months and they typically give birth to one calf.

One-horned rhinoceroses are an endangered species and there are only about 3,500 left in the wild. The main threats to rhinos are poaching and habitat loss. Poachers kill rhinos for their horns, which are used in traditional Chinese medicine. Habitat loss is a problem because rhinos need large areas of land to live and breed.

The Pobitora Wildlife Sanctuary is an important conservation area for one-horned rhinoceroses. The sanctuary is home to about 200 rhinos, which is about 6% of the world’s population. The sanctuary is also home to a variety of other wildlife, including tigers, elephants, deer, and birds.

The Pobitora Wildlife Sanctuary is a popular tourist destination. Visitors can go on jeep safaris to see the wildlife. The sanctuary also has a visitor center with information about the wildlife and the conservation efforts.