These questions consist of two statements each, printed as assertion and reason, while answering...

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These questions consist of two statements each, printed as assertion and reason, while answering these questions you are required to choose any one of the following responses.
(A) If assertion is true but the reason is false
\( \mathrm{P} \)
(B) If assertion is false but reason is true
(C) If both assertion and reason are true and the reason is the correct explanation of assertion
W
(D) If both assertion and reason are true but reason is not the correct explanation of assertion
Assertion : \( 2^{\text {nd }} \) period elements do not involve in excitation of electron.
Reason \( : 2^{\text {nd }} \) period elements do not have vacant \( 2 d \)-orbitals.
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