The correct option, which includes Andaman and Nicobar Islands, Gulf of Kachchh, and Gulf of Mannar, is accurate because these regions possess thriving coral reef ecosystems supported by warm, shallow waters. The Andaman and Nicobar Islands are renowned for their diverse coral reefs, while the Gulf of Mannar is recognized as a significant marine biosphere reserve that features extensive coral formations. The Gulf of Kachchh also contains coral patches that contribute to its marine biodiversity. In contrast, the Sunderbans, characterized by mangrove forests and brackish water, do not support coral reefs, underscoring the importance of marine ecological conditions for coral growth.