Crossword puzzle

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Across
  1. 1. Which element has the chemical symbol "O"?
  2. 4. Who was the first Indian woman to score a century in T20 internationals?
  3. 5. What is the SI unit of power
  4. 8. What is a common language for web development?
  5. 10. What was the name of the first dog to go to space?
  6. 12. Which team has won the most ICC Cricket World Cups
  7. 13. Which footballer is known as "The King of Football"?
  8. 14. Which sport is known as the "king of sports"?
  9. 15. What is the largest moon of Saturn?
  10. 17. Which of the following is an operating system?
  11. 20. What is the closest planet to the Sun?
Down
  1. 2. Which program is ISRO developing to send astronauts into space?
  2. 3. What is the name of the first human to travel into space?
  3. 4. Who is known as "The Greatest of All Time" in boxing?
  4. 6. What is the hardest natural substance on Earth?
  5. 7. Who was the first person to walk on the Moon?
  6. 9. Which planet is known as the "Red Planet"?
  7. 11. What is the capital city of France?
  8. 16. Which of the following is the unit of force?
  9. 18. What is the unit of electrical resistance
  10. 19. What is the unit of work in the SI system?