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Assertion : Thin films such as soap bubble or a thin layer of oil on water show beautiful colours when illuminated by white light. Reason : It happens due to the interference of light reflected from the upper surface of the thin film.

1. If both assertion and reason are true and reason is the correct explanation of assertion.
2. If both assertion and reason are true but reason is not the correct explanation of assertion.
3. If Assertion is true but reason is false.
4. If both assertion and reason are false. PG #3

Correct answer: If Assertion is true but reason is false.

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