Which of them ... a has the largest / smallest population?
b has a national day in spring?
c has a national day in autumn?
d has a blue and white flag?
e has a red, green and white flag?
f has a white and red flag?

1) China has the largest population.

Pitcairn Island has the smallest population.

2) Greece, Ireland and Netherlands have a national independence day in spring. Azerbaijan, Kazakhstan, Kyrgyzstan, Uzbekistan and Georgia have a national day in spring.

3) Slovakia, Brazil, Mexico, Austria and Poland have a national independence day in autumn. Ireland, Deutsch and Great Britain have a national day in autumn.

4) Greece, Finland, Guatemala, Honduras, Salvador Argentina, Nicaragua, San Marino, Uruguay, Andreevsky flag have a blue and white flag.

5) Oman, Kuwait, Tajikistan, Italy, Bulgaria, Equatorial Guinea, Madagascar, Mexico have a red, green and white flag.

6) Bahrain, Georgia, Singapore, Indonesia, Japan, Austria, Gibraltar, Malta, Poland, Switzerland, Deutsch, Monaco, Tunisia, Peru, Tongo, French Polynesia have a red and white flag.