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(A) The reaction shown is the hydroboration-oxidation of $1$-methylcyclohexene.Hydroboration-oxidation is a stereospecific reaction that involves the

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(A) The reaction shown is the hydroboration-oxidation of $1$-methylcyclohexene.Hydroboration-oxidation is a stereospecific reaction that involves the syn-addition of water ($H$ and $OH$) across the double bond.It follows anti-Markovnikov regioselectivity,where the $OH$ group attaches to the less substituted carbon atom.In $1$-methylcyclohexene,the $OH$ group will add to the $C_2$ position,and the $H$ atom will add to the $C_1$ position.Since it is a syn-addition,both the $H$ and $OH$ groups add to the same face of the double bond,resulting in the formation of $trans$-$2$-methylcyclohexanol (as a racemic mixture of enantiomers).Option $A$ represents the correct stereochemical product,where the $OH$ and $CH_3$ groups are in a trans-like relationship relative to the added hydrogen.

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