Which of the following reactions will give 2,2-dibromopropane as its product?

CH2=CH-CH3 + 2HBr -----> CH3-CH=CH2 + 2HBr -----> CH3-C≡CH + 2HBr -----> CH3CH=CHBr + 2HBr ----->

CH3-C≡CH + 2HBr ----->

Preparation of 2,2-dibromopropane takes place according to Markownikoff's rule using propyne and hydrogen bromide. Step 1:Electrophilic addition of H+ CH3-C≡CH + HBr -----> CH3-C(Br)=CH2 Step 2: CH3-C(Br)=CH2 + HBr -----> CH3-C(Br)2-CH3