Explanation
The largest gulf in the world is A) Gulf of Mexico.
The Gulf of Mexico is located in the Atlantic Ocean and is bordered by the United States to the north and Mexico to the south. It is known for its significant size and is one of the most important bodies of water in terms of commercial and ecological importance. The Persian Gulf, Gulf of Carpentaria, and Gulf of Mannar are all significant gulfs but are smaller in comparison to the Gulf of Mexico.