The major product(P) in the following reaction is

In this reaction, the given ether is converted to phenolic derivative and ethyl bromide.

Treatment of alkenes with hydrobromic acid will result in the formation of alkyl bromides according to Markonvikov's rule. Markonvikov's rule is that when an unsymmetrical reagent adds to an unsymmetrical alkene, the more positive part of the agent goes to the carbon that has more hydrogen atoms.