Answer the country name from the national flag!

It is a 4 choice question answering the country name from the flag.
There are three game types below.
To learn national flag or country, to compete score, feel free to select according to the purpose.^^
1, Training Mode
It is a self-study mode that continues to answer questions.
2, Challenge Mode
It is a battle mode that ranks by consecutive correct answer counts.
3, Time Attack Mode
It is a battle mode that ranks by answer time of 10 questions.　
There are two ranks in their own device rank and world rank.
I think you will be No. 1.^^
Some of the flags are not fully reproduced, but please understand.
For details, please see the support URL.
Thank you!