Assertion :For four half-cell reactions involving different number of electrons,
$E_{4} = E_{1} + E_{2} + E_{3}$ Reason: $Δ G_{4} = Δ G_{1} + Δ G_{2} + Δ G_{3}$

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is D Assertion is incorrect but Reason is correct
(A) is incorrect since EMFs are neither additive nor subtractive.

(R) is correct but not the explanation of (A). (R) is an independent statement and $Δ G$ are additive or subtractive.

Hence, option D is correct

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