What is the major product of the following reaction?

Question

Quizplus · Accepted Answer

The reaction involves the reaction of a primary alcohol with PBr3 and Br2, which results in the conversion of the alcohol to an alkyl bromide. The major product of the reaction is III, which is 2-bromobutane. This is because the PBr3 converts the alcohol to an alkyl bromide, and the Br2 subsequently adds to the double bond, leading to the formation of a vicinal dibromide. However, since the reaction is run under basic conditions, elimination of HBr can also occur leading to the formation of IV and V as minor products. Nonetheless, the major product is C.

What Is the Major Product of the Following Reaction