General Knowledge

Explanation: Afghanistan borders six countries.

Explanation: Kitab al-Hind' was written by Al-Biruni.

Explanation: The Chernobyl nuclear disaster occurred in 1986.

Explanation: The first Earth Day was celebrated on 22 April 1970.

Explanation: 22 April is observed internationally as Earth Day.

Explanation: Earth Day is celebrated annually on 22 April.

Explanation: The 2022 Earth Day theme was 'Invest in Our Planet.'

Explanation: The Indus River is about 3,180 km long.

Explanation: Lord Canning was the first Viceroy of India.

Explanation: 23 April is observed as World Book Day.