Addition Reactions

In the given reaction, the alkene reacts with excess HBr, leading to an electrophilic addition.

• The double bond in breaks and the hydrogen from HBr adds to the most substituted carbon (according to Markovnikov's rule).
• The bromine atom (Br⁻) adds to the other carbon.
• Since there is excess HBr, both carbons of the double bond will be attached to bromine atoms, leading to the major product being a dibromide.

The correct answer is (A) : CH₃ - CHBr - CH₂Br.