Correct Option
Langurs are Old World monkeys belonging to the family Cercopithecidae. Apes, in contrast, belong to the superfamily Hominoidea (which includes families Hominidae and Hylobatidae) and are characterized by the absence of a tail, a feature that distinguishes them from most monkeys. Therefore, Langur is not an ape.
Incorrect Options
- Gibbons are classified as lesser apes, belonging to the family Hylobatidae. They are known for their arboreal locomotion and long limbs.
- Gorillas are great apes, belonging to the family Hominidae. They are recognized for their large size and close genetic relation to humans.
- Orangutans are great apes, also belonging to the family Hominidae. They are native to the rainforests of Borneo and Sumatra in Southeast Asia.