Vietnam is the only country in the world that starts with V.

The statement is false as there are actually two countries in the world that start with the letter "V," not just Vietnam. The other country is Vanuatu, which is a small island nation located in the South Pacific Ocean. Vanuatu is known for its diverse culture, stunning landscapes, and vibrant coral reefs, making it a popular tourist destination. Therefore, Vietnam is not the only country in the world starting with the letter "V."