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(B) The reaction is an $E2$ elimination of a substituted cyclohexyl chloride using a strong base,$NaOEt$.For $E2$ elimination to occur,the leaving gro

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(B) The reaction is an $E2$ elimination of a substituted cyclohexyl chloride using a strong base,$NaOEt$.For $E2$ elimination to occur,the leaving group $(-Cl)$ and the $\beta$-hydrogen must be in an anti-periplanar conformation.In the given molecule,the $-Cl$ is in an equatorial position. For the reaction to proceed,the molecule must flip to a conformation where the $-Cl$ is axial.Once in the axial position,the $\beta$-hydrogen at the adjacent carbon must also be anti-periplanar to the $-Cl$.The elimination occurs to form the most stable alkene,which is the more substituted one (Zaitsev's rule).The product formed is $4$-isopropyl-$1$-methylcyclohex-$1$-ene.

What is the major product of the following reaction?

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