Which planet is known as the Red Planet?

Which is the largest ocean on Earth?

Who wrote the play "Romeo and Juliet"?

Which gas do plants absorb from the air?

Which animal is known as the 'Ship of the Desert'?

How many continents are there in the world?

Which festival is known as the Festival of Lights?

What is the currency of Japan?

Which bird is the national symbol of the United States?

Who discovered gravity?