The correct answer is - A. Southern Ocean.
The Southern Ocean is a large water body located around the continent of Antarctica. On one side, this ocean has a boundary with land, that is the southern part of it, bordering with the land mass of Antarctica.
On the other sides though, this ocean has boundaries with other water bodies, or rather oceans, not with land masses, making it the only ocean that has a boundary with three other oceans. The Southern Ocean has a boundary with the Atlantic Ocean, Indian Ocean, and the largest Pacific Ocean.
This ocean has very cold waters, part of which are frozen, and the typical landscape of it is with countless icebergs floating on it. It is very similar to the Arctic Ocean.
