The smallest sea of the world is _____________.
a.Red sea
b.Baltic sea
c.North sea
d.Bering sea

Hint: The smallest sea of the world, amongst the given options is an important water body in Europe and is surrounded by Estonia, Latvia and Lithuania. These states are together named after this sea.

Complete answer:
a.Red sea: Red Sea is located in between Asia and Africa and covers an area of almost 438000 million square kilometres. It is rich in ferric salts which give it a reddish color and hence it is named the Red Sea. So, it is an incorrect option.
b.Baltic sea: The Blatic Sea is located in the continent of Europe and the countries of Estonia, Lithuania and Latvia are located on the eastern coast of the Blatic Sea. This is the reason these nations are called the Balic States. So, it is the correct option.
c.North sea: The North Sea is the forty sixth largest sea in the world and has an area of almost 575 million square kilometers. This is located north of the United Kingdom and south of Greenland. So, it is an incorrect option.
d.Bering sea: Bering Sea is located in between the continents of Asia and North America. It forms the boundary between Russia and the United States of America. It is also the world’s fourteenth largest sea in the world. So, it is an incorrect option.

So, the correct answer is option b.

Note: The smallest sea in the world is the Marmara Sea in Turkey which connects Black Sea and the Aegean Sea. It has an area of only 0.6 square kilometers.