In the reaction with $\text{HCl}$, an alkene reacts in accordance with the Markovnikov’s rule, to give a product $1$ -chloro-$1$ -methylcyclohexane. The possible starting alkene is:

Both $1$ -methylcyclohexene and methylenecyclohexane react with $\text{HCl}$ to form the same tertiary carbocation intermediate ($1$ -methylcyclohexyl cation) at the $1$ -position, which then reacts with ${\text{Cl}}^{-}$ to give $1$ -chloro-$1$ -methylcyclohexane as the major Markovnikov product.