Correct Option
The correct option is Gulf of Mannar and Palk Strait.
Explanation
The geographical separation between the Indian subcontinent and the island nation of Sri Lanka is formed by a series of shallow maritime features located off the southeastern coast of India (Coromandel Coast).
Option Analysis
- Gulf of Khambhat and Palk Strait is Incorrect: The Gulf of Khambhat is located on the western coast of India in the Arabian Sea, separating the Kathiawar Peninsula from the southeastern part of Gujarat. It does not border Sri Lanka.
- Gulf of Mannar and Ten Degree Channel is Incorrect: The Ten Degree Channel is a wide channel in the Bay of Bengal that separates the Andaman Islands (specifically Little Andaman) from the Nicobar Islands (Car Nicobar).
- Gulf of Mannar and Palk Strait is Correct: The Palk Strait and the Gulf of Mannar are the primary water bodies separating India from Sri Lanka. The Palk Strait connects the Bay of Bengal to Palk Bay. To the south of Palk Bay lies Adam’s Bridge (Ram Setu) and the Gulf of Mannar, which opens into the Indian Ocean.
- Palk Bay and Nine Degree Channel is Incorrect: The Nine Degree Channel is located in the Arabian Sea and separates the island of Minicoy from the main archipelago of Lakshadweep (specifically the Laccadive Islands).
Key Takeaway: The maritime boundary between India and Sri Lanka consists of the Palk Strait in the north and the Gulf of Mannar in the south.