In the reaction with HCl, an alkene reacts in accordance with the markovnikov’s rule, to give 1-chloro-1 methylcyclohexane. The possible alkene is
A compound 'X' reacts with conc. Sulphuric acid to give an alkene. The alkene reacts with bromine and subsequent treatment of the product with alcoholic KOH yields propyne. The formula of the compound is