Sri Lanka is separated from the Indian mainland by which strait?

The correct answer is the Palk Strait, the shallow, narrow channel of water that separates Sri Lanka from the southeastern coast of Tamil Nadu, India. The Palk Strait connects the Bay of Bengal in the north to the Palk Bay, and further southwest it links, via the Adam's Bridge (Ram Setu) chain of limestone shoals and islets, to the Gulf of Mannar, which lies between the two countries on the other side. This question tests precise recall because the three distractor straits are all real, well-known global choke points that candidates might confuse if they only vaguely remember "a strait near Sri Lanka." The Strait of Malacca, option A, lies thousands of kilometres away between the Malay Peninsula and the Indonesian island of Sumatra, and is one of the world's busiest shipping lanes connecting the Indian Ocean to the South China Sea — it has no connection to Sri Lanka. Bab-el-Mandeb, option B, is located at the southern entrance to the Red Sea, between Yemen on the Arabian Peninsula and Djibouti/Eritrea in the Horn of Africa, making it geographically irrelevant to South Asia. The Strait of Hormuz, option D, connects the Persian Gulf to the Gulf of Oman and is critical to global oil shipping, but it lies off the coast of Iran and Oman, far from the Indian subcontinent. A common exam confusion is mixing up the Palk Strait with the Gulf of Mannar, since both lie between India and Sri Lanka; the key distinction is that the Palk Strait is the northern channel while the Gulf of Mannar lies to the south, with Adam's Bridge connecting the two. Revision tip: always pair "Palk Strait" specifically with the India–Sri Lanka separation for quick recall.