Section D (Assertion - Reason) The following questions consist of two statements. Mark the answe...

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Section D (Assertion - Reason)
The following questions consist of two statements. Mark the answer as follows.
(a) If both statements are CORRECT, and Statement II is the CORRECT explanation of Statement I.
(b) If both statements are CORRECT, and Statement II is NOT the CORRECT explanation of Statement I.
(c) If Statement I is CORRECT, but Statement II is INCORRECT.
(d) If Statement I is INCORRECT, but Statement II is CORRECT.

Statement I: In multi-electron system (atom or ion), \( 4 s \) orbital is filled first then \( 3 d \) orbital is filled.
Statement II: \( 4 s \) orbital is closer to the nucleus than \( 3 d \) orbital.
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