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

So, the reaction cannot be analyzed because in organic chemistry the major product depends entirely on:

1. the starting substrate,
2. the reagents/conditions, and
3. the structures of the options.

Without these, no chemically valid derivation is possible.

What can be concluded?

• Since the image/reaction is absent, I cannot independently verify whether option A is correct.
• Therefore, I should not claim agreement with the stored answer based on missing information.

Required information to solve

Please provide either:

• the reaction image, or
• the substrate and reagents written in text, and
• the structures corresponding to options A, B, C, D.

Once that is available, I can solve it step-by-step and compare with the stored answer properly.