Which of the following is not formed as one o | vedclass

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(C) The reaction of $3,4$-dimethylcyclopentanone with $CH_3MgCl$ (a Grignard reagent) followed by $NH_4Cl$ (acidic workup) is a nucleophilic addition

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(C) The reaction of $3,4$-dimethylcyclopentanone with $CH_3MgCl$ (a Grignard reagent) followed by $NH_4Cl$ (acidic workup) is a nucleophilic addition reaction to the carbonyl group. \ The nucleophile $(CH_3^-)$ can attack the planar carbonyl carbon from either the top face or the bottom face. \ The starting material,$3,4$-dimethylcyclopentanone,has two chiral centers at positions $3$ and $4$. \ Depending on the stereochemistry of the starting material (e.g.,cis or trans isomer),the attack of the Grignard reagent will lead to the formation of diastereomers. \ Since the carbonyl carbon is prochiral,the attack from the two faces will result in two different stereoisomers (epimers at the new chiral center). \ Option $C$ represents a structure where the relative stereochemistry of the methyl groups is changed (one up,one down),which is not possible through a simple nucleophilic addition to the carbonyl group without affecting the existing chiral centers. Thus,the structure in option $C$ is not formed.

Which of the following is not formed as one of the products in the following reaction?

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