Endangered Irrawaddy dolphin is found in:

Correct option is A

Correct Answer: (a) Chilika lake
Explanation:
→ The Irrawaddy dolphin (Orcaella brevirostris) inhabits brackish water lagoons, and Chilika Lake holds India’s only lagoon population.
→ It is critically important for conservation due to decreasing population and habitat threats.
Information Booster:
→ Ecotourism in Chilika is centered around these dolphins; strict protection zones are maintained.
Additional Information:
(b), (c), (d): No natural populations recorded.