The hoolock gibbon, India’s only ape species, is found primarily in:

Karbi Anglong
Barak Valley
Northeastern Assam
Central Assam

The correct answer is: a) Karbi Anglong.

The hoolock gibbon is a species of gibbon found in the eastern Himalayas and western Myanmar. It is the only ape species found in India. The hoolock gibbon is a large, black ape with a white face and throat. It is an arboreal animal that lives in forests. The hoolock gibbon is an endangered species due to habitat loss and hunting.

Karbi Anglong is a district in the Indian state of Assam. It is located in the north-eastern part of the state. The district is home to a number of ethnic groups, including the Karbi people. Karbi Anglong is a mountainous district with a tropical climate. The district is home to a number of forests, including the Dehing Patkai National Park.

The hoolock gibbon is found in the forests of Karbi Anglong. The gibbon is an important part of the forest ecosystem. It helps to disperse seeds and pollinate plants. The gibbon is also a popular tourist attraction.

Barak Valley is a region in the Indian state of Assam. It is located in the south-eastern part of the state. The valley is home to a number of ethnic groups, including the Bengali people. Barak Valley is a fertile region with a tropical climate. The valley is home to a number of rivers, including the Barak River.

The hoolock gibbon is not found in Barak Valley. The gibbon is found in the forests of Karbi Anglong, which is located in the north-eastern part of Assam.

Northeastern Assam is a region in the Indian state of Assam. It is located in the north-eastern part of the state. The region is home to a number of ethnic groups, including the Assamese people. Northeastern Assam is a mountainous region with a tropical climate. The region is home to a number of forests, including the Kaziranga National Park.

The hoolock gibbon is found in the forests of Karbi Anglong, which is located in the north-eastern part of Assam. The gibbon is not found in the other parts of northeastern Assam.

Central Assam is a region in the Indian state of Assam. It is located in the central part of the state. The region is home to a number of ethnic groups, including the Assamese people. Central Assam is a fertile region with a tropical climate. The region is home to a number of rivers, including the Brahmaputra River.

The hoolock gibbon is not found in Central Assam. The gibbon is found in the forests of Karbi Anglong, which is located in the north-eastern part of Assam.