Cyclohexanol is an alcohol and undergoes a dehydration reaction with sulfuric acid as shown - HSC - SSCE Chemistry - Question 11 - 2022 - Paper 1

In the dehydration reaction of cyclohexanol with concentrated sulfuric acid, the hydroxyl (-OH) group is removed, leading to the formation of a double bond. This is an elimination reaction, also known as dehydration.

The major product of this reaction is cyclohexene, which corresponds to option B. Cyclohexene is the most stable alkene formed from this dehydration process, as it possesses a more favorable degree of substitution compared to any possible byproducts that may form from other configurations.