Vatican City claims which geographic title?

Here is the question :

VATICAN CITY CLAIMS WHICH GEOGRAPHIC TITLE?

Here is the option for the question :

• World’s lowest average elevation
• World’s shortest river
• World’s smallest country
• Only landlocked country in Europe

The Answer:

And, the answer for the the question is :

Explanation:

[STC009762]. The Vatican City is the world’s smallest country by land area (and by population), measuring 0.2 square miles. The Vatican, the world’s seat of the Roman Catholic Church, is entirely encircled by the city of Rome and was established as an autonomous city-state in 1929. Even though it’s small, Vatican City does have a radio station, banking system, and post office.