Indian geography/ecology: Identify where coral reefs are found in India by major regions. Consider the seas and island groups known for reef ecosystems. Choose the correct set of locations.

Given data

• Ask: Indian regions with coral reefs.

Concept/Approach
India's significant coral reef areas occur around island chains and certain gulfs with suitable warm, shallow marine conditions.

Reasoning
• Major reef regions: Lakshadweep (atolls), Andaman & Nicobar (fringing reefs), Gulf of Mannar (patch and fringing), Gulf of Kachchh (fringing/patch). • The lake/estuarine or terrestrial options do not support coral reefs.

Final Answer
Gulf of Kachchh, Gulf of Mannar, Lakshadweep, and Andaman & Nicobar Islands