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: E
Solution :
If electron is moving parallel to the magnetic field, then the electron is not deflected i.e., if electron is not deflected we cannot be sure that there is no magnetic field in that region.
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