Assertion : When tiny circular obstacle is placed in the path of light from some distance, a bright spot is seen at the centre of the shadow of the obstacle. Reason : Destructive interference occurs at the centre of the shadow.

• A

  If both the assertion and reason are true and reason is a correct explanation of the assertion.
• B

  If both assertion and reason are true but assertion is not a correct explanation of the assertion.
• Correct answer
  C

  If the assertion is true but the reason is false.
• D

  If both assertion and reason are false.

Hence, the correct answer is option: 'C'.