Product

i guess ulta sankarna
cn will go on d upper carbon n br on d lower

cn molecule larger than br molecule .if cn will be at the upper carbon then it will steric hinderance which is more unstable

tertairy carbocation will b forrmd coz tahts more stable

ps: sorry if ma thinkin is wrng mah org sucks

nice integrations is right .

sankara's product is right if he replaces Br by CN and Cn by Br.

here the reactant can be split as BrCN i.e Br⁺ CN^-

hope it's clear