Final answer:
The major product of the given reaction is OCH₂Br.
Step-by-step explanation:
The major product of the given reaction is option d) OCH₂Br.
When CH₃OBr is reacted with CHBr₃ in the presence of NaOH, a substitution reaction known as the Williamson ether synthesis occurs. This reaction replaces the CH₃O group of CH₃OBr with the CHBr₃ group, forming the ether OCH₂Br.
Therefore, the major product of the reaction is OCH₂Br.