Step 1: Understanding the Concept:
The question asks to identify the narrow body of water that separates India and Sri Lanka.
Step 2: Detailed Explanation:
\[\begin{array}{rl} \bullet & \text{The Palk Strait is a strait that lies between the Indian state of Tamil Nadu and the Jaffna District of the island nation of Sri Lanka.} \\ \bullet & \text{It connects the Bay of Bengal in the northeast with the Gulf of Mannar in the southwest.} \\ \bullet & \text{The other straits are located elsewhere:} \\ \bullet & \text{Malacca Strait: Between the Malay Peninsula and the Indonesian island of Sumatra.} \\ \bullet & \text{Bering Strait: Between Russia and the United States (Alaska).} \\ \bullet & \text{Hormuz Strait: Between the Persian Gulf and the Gulf of Oman.} \\ \end{array}\]
Step 3: Final Answer:
India is separated from Sri Lanka by the Palk Strait.