The product obtained when propene undergoes addition reaction with HBr in the presence of benzoyl peroxide is :

Question

$\begin {array} {1 1} (1)\;1-bromopropane & \quad (2)\;2-bromopropane \\ (3)\;1,2-dibromopropane & \quad (4)\;2,2-dibromopropane \end {array}$