Bay of Bengal, Southeast of mainland
Explanation
India possesses two major island groups located on either side of the peninsular mainland, distinguished by their location in specific water bodies and their direction relative to the coast.
- Andaman and Nicobar Islands: These islands are situated in the Bay of Bengal. Geographically, they lie to the southeast of the Indian mainland. They form an elongated chain extending from north to south.
- Lakshadweep Islands: These islands are located in the Arabian Sea. They lie to the southwest of the Indian mainland (specifically off the coast of Kerala).
Therefore, the description "Bay of Bengal, Southeast of mainland" accurately identifies the location of the Andaman and Nicobar Islands.
Key Takeaway: The Andaman and Nicobar Islands are located in the Bay of Bengal (Southeast of the mainland), while the Lakshadweep Islands are located in the Arabian Sea (Southwest of the mainland).