Identify the main product $X$ in the following reaction:
$\text{Cyclohexanol} + \text{alcoholic } KOH + \Delta \rightarrow X$

(D) The reaction of cyclohexanol with alcoholic $KOH$ under heating conditions leads to the dehydration of the alcohol.
This is an elimination reaction where a water molecule $(-H_2O)$ is removed from the cyclohexanol molecule.
The hydroxyl group $(-OH)$ is removed from the carbon atom,and a hydrogen atom is removed from an adjacent carbon atom,resulting in the formation of a double bond.
Thus,the main product $X$ is cyclohexene.