Answer: (b)

Explanation:
Statement 1 is correct: The Western Hoolock Gibbon is India's only ape species and is classified as Endangered on the IUCN Red List. It is found in several protected areas and sanctuaries in Northeast India, such as in Assam, Arunachal Pradesh, and Meghalaya. The Hoollongapar Gibbon Sanctuary in Jorhat, Assam, is a famous, dedicated protected area specifically named after and managed for the conservation of this unique primate.

Statement 2 is correct: Hoolock gibbons are highly specialized for brachiation, meaning they move by swinging hand-over-hand through forest canopies. Their long arms and hook-like hands allow efficient and rapid movement between trees.

Statement 3 is incorrect: Unlike gorillas, hoolock gibbons are small, lightweight apes with a slender build adapted for arboreal life. They are not heavy or robust; instead, their light body structure is what enables agile swinging through trees.