Guess the theme of the lesson

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Across
  1. 3. Wheel shape
  2. 6. It can be a fruit; it can be a color too
  3. 7. Which flower is the queen of flowers?
  4. 8. The sun smiles and...
Down
  1. 1. Master of all discoveries and inventions
  2. 2. The month of the Teacher’s Day
  3. 4. What is the name of the tower with the clock?
  4. 5. One of the four answers is correct