In the following given reaction,'A' is the ma | vedclass

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(C) The reaction involves the electrophilic addition of $HBr$ to $1$-cyclobutyl$-1-$methylethene. Step $1$: Protonation of the double bond by $H^+$ fr

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$1-$bromo$-1,2-$dimethylcyclopentane

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(C) The reaction involves the electrophilic addition of $HBr$ to $1$-cyclobutyl$-1-$methylethene. Step $1$: Protonation of the double bond by $H^+$ from $HBr$ forms a more stable tertiary carbocation. Step $2$: The cyclobutyl ring undergoes a ring expansion to form a more stable $5$-membered cyclopentyl ring carbocation. Step $3$: The $Br^-$ ion attacks the carbocation to form the final major product,which is $1$-bromo$-1,2-$dimethylcyclopentane.

In the following given reaction,'$A$' is the major product:

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