With respect to the Western Hoolock Gibbons, which of the following statements is/are correct? 1. A Sanctuary in North-east India is home to this ape species listed as Endangered in the International Union for Conservation of Nature (IUCN) Red List. 2. They have specialized brachiation and can easily swing between trees. 3. They possess a strong and heavy build like gorillas, yet are remarkably agile tree climbers.

Option (B) — 1 and 2

• The Western Hoolock Gibbon (Hoolock hoolock) is found in northeast India and is listed as Endangered on the IUCN Red List. Hollongapar Gibbon Sanctuary in Assam is specifically dedicated to this species.
• Gibbons are known as the greatest brachiators among primates. They have long arms and specialized shoulder joints that allow them to swing efficiently between trees at high speed.
• Gibbons are the smallest apes and have a slender, lightweight build, very unlike gorillas which are large and heavily built. This lightweight build is precisely what enables their agile brachiation.

• 1. A Sanctuary in North-east India is home to this ape species listed as Endangered in the IUCN Red List: Correct. Hollongapar Gibbon Sanctuary in Assam is home to Western Hoolock Gibbons, and they are classified as Endangered by IUCN.
• 2. They have specialized brachiation and can easily swing between trees: Correct. Gibbons are the most skilled brachiators among primates, with long arms and ball-and-socket wrist joints enabling efficient arboreal locomotion.
• 3. They possess a strong and heavy build like gorillas, yet are remarkably agile tree climbers: Incorrect. Gibbons are the smallest of the apes with a slender, lightweight body. They are nothing like gorillas in build.