A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Correct Answer: D
Solution :
TV signals (frequency greater than 30 MHz) cannot be propagated through sky wave propagation. Above critical frequency, an electromagnetic wave penetratates the ionosphere and is not reflected by it.
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