Pinctada margaritifera is endemic to:

Correct option is B

Correct Answer: (b) Andaman
Explanation:
→ Pinctada margaritifera (black-lip pearl oyster) has important natural populations in the Andaman & Nicobar region of India and Indo-Pacific lagoons.
→ The species thrives in clear, sheltered coral and lagoonal habitats common around Andaman islands.
Information Booster:
→ It is the principal species for cultured pearl production in many tropical Indo-Pacific countries.
Additional Information (Other Options):
(a) Lakshadweep: has pearl oysters but P. margaritifera distribution is stronger in Andaman; (c)/(d) Palk regions host other bivalves but not primarily this species.