GKFix MCQ Question

What is the expected major product when but-2-yne (CH₃CH₂C≡CH₃) reacts with one equivalent of HBr?

• A. 1-Bromobut-2-ene
• B. 2-Bromobut-2-ene
• C. But-2-ene
• D. 1,2-Dibromobutane