The question refers to “the following reaction” and asks for the major product, but the actual reaction scheme/structures and the option structures A–D are missing from the prompt.

So, with the information provided, the product cannot be determined uniquely.

Why the question is unsolvable as given

To identify the major product in organic chemistry, we need:

1. The starting compound(s)
2. The reagent(s)/conditions
3. The structures of options A, B, C, D

Here, all of these are absent. Therefore, no valid step-by-step chemical derivation can be carried out.

Conclusion

Because the reaction and options are missing, I cannot independently verify whether option D is correct.

If you send the reaction image or write the reactant/reagent/options explicitly, I can solve it properly step-by-step and compare with the stored answer.