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(B) The reaction involves the nucleophilic addition of the Grignard reagent $(CH_3MgBr)$ to the carbonyl group of $3$-methylcyclohexanone. Since the s

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diastereomers

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(B) The reaction involves the nucleophilic addition of the Grignard reagent $(CH_3MgBr)$ to the carbonyl group of $3$-methylcyclohexanone. Since the starting material,$3$-methylcyclohexanone,is chiral,the attack of the $CH_3^-$ nucleophile can occur from either the top or the bottom face of the planar carbonyl group. This leads to the formation of two new stereoisomers at the newly formed chiral center. Because the molecule already contains a fixed chiral center at the $C-3$ position,the two resulting products have different configurations at the new chiral center while sharing the same configuration at the $C-3$ position. Such stereoisomers that are not mirror images of each other are known as diastereomers.

List-$I$ (Type of reaction)	List-$II$ (Final Product)
$A$. Reimer-Tiemann reaction	$I$. Chlorobenzene
$B$. Etard reaction	$II$. Salicylaldehyde
$C$. Sandmeyer reaction	$III$. Benzaldehyde
$D$. Friedel-Crafts reaction	$IV$. Acetophenone

Comment on the optical activity of the products. They are:

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