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Question is

Assertion: An n-type semiconductor has a large number of electrons but still it is electrically neutral.
Reason: An n-type semiconductor is obtained by doping an intrinsic semiconductor with a pentavalent impurity.

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

If both assertion and reason are true but reason is not the correct explanation of assertion.

If assertion is true but reason is false.

If both assertion and reason are false.

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