The major product of the above reaction is:

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(A) The reaction involves a substrate with a thiol group $(-SH)$ and a chlorine atom $(-Cl)$ in a trans-like orientation on a cyclohexane ring. In the

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(A) The reaction involves a substrate with a thiol group $(-SH)$ and a chlorine atom $(-Cl)$ in a trans-like orientation on a cyclohexane ring. In the presence of $NaOH$,the thiol group is deprotonated to form a thiolate ion $(-S^-)$. This internal nucleophile then attacks the carbon bearing the chlorine atom via an intramolecular nucleophilic substitution reaction,a process known as Neighboring Group Participation $(NGP)$. This leads to the formation of a cyclic sulfide (a bridged bicyclic compound) as the major product.

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