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.

The Hoollongapar Gibbon Sanctuary in Assam is home to the Western Hoolock Gibbon, India's only ape species, which is listed as Endangered on the IUCN Red List — Statement 1 is correct. Gibbons are renowned for brachiation (arm-swinging locomotion) and have specialized long arms that allow them to swing easily between trees — Statement 2 is correct. Statement 3 is incorrect because gibbons are small, lightweight apes (typically 6-9 kg), not heavily built like gorillas; they belong to the lesser apes family Hylobatidae and have a slender build adapted for arboreal life.