Where in the world?
The flag of Bangladesh has a green field with a red disc slightly off-center towards the hoist.

Bangladesh

Population: 164,689,383

Region: Asia

Subregion: Southern Asia

Capital: Dhaka

Top Level Domain: .bd

Currencies: Bangladeshi taka

Border countries

The flag of Myanmar has a horizontal tricolor of yellow, green, and red with a white five-pointed star in the center.

Myanmar

Population: 54,409,794

Region: Asia

Capital: Naypyidaw
The flag of India has three horizontal stripes of saffron, white, and green, with a blue Ashoka Chakra in the center of the white stripe.

India

Population: 1,380,004,385

Region: Asia

Capital: New Delhi