The only country in the world whose flag is not square or rectangle is?

The correct answer is Nepal.Key Points

• Nepal is the only country in the world that does not have a square or rectangular national flag.
• Nepal's national flag is in a triangle shape.
• Nepal's flag is a combination of two single pennons.
• It was adopted on 16 December 1962.
• The crimson-red color in Nepal's national flag indicates the bravery of the Nepali people.
• The blue border in the national flag represents peace and harmony.
• Kathmandu is the capital city of Nepal.

Additional Information​ 

• The national flag of India is in rectangular shape.
  • It was designed in the proportion of (width to length)2:3.
  • It was designed by Pingali Venkayya.
  • It was adopted on 22 July 1947.

• Srilanka Flag:

Bhutan Flag

Maldives Flag: