Question: In which year did World War I begin?

• Answer: 1914

Question: Which Indian leader is known as the 'Iron Man of India'?

• Answer: Sardar Vallabhbhai

Question: What is the main source of energy for the Earth?

• Answer: Sun

Question: Which is the only metal that is liquid at room temperature?

• Answer: Mercury

Question: What does DNA stand for?

• Answer: Deoxyribonucleic Acid.