The question refers to “the following reaction”, but the actual reaction scheme/structure is missing from the prompt. Also, the options A, B, C, D are blank, so there is no chemical information available to evaluate.

Because of this, the major product cannot be derived from the reaction mechanism using chemistry.

What can be concluded?

1. To identify the major product in haloalkanes/haloarenes, we would normally need:
   • the starting substrate,
   • the reagent(s) and conditions,
   • and the structures of options A–D.
2. None of these are visible here.
3. Therefore, a genuine step-by-step chemical solution is not possible from the provided data.

Comparison with stored answer

The stored correct answer is B, but since the reaction and options are absent, I cannot independently verify that choice from chemical reasoning.

So, I must disagree with the stored answer for verification purposes, because there is insufficient information to derive it.