National flag quiz

It is the quiz which looks at the national flag and applies the name of a country.
Since a problem is set from 193 nations of U.N. members, other countries, and 204 nations in all of areas, please challenge [ how many questions can answer and ].
Please apply the capital of the country out of four choices based on the national flag displayed on a screen.
The point is given according to the number of correct answers.
It can compete for a total point in the user and net ranking in the world.

[Recent Changes]
Time limit add.