The question statement says “The major product of the following reaction is”, but the actual reaction scheme and option structures are missing from the prompt.

Because the substrate/reagents/products are not shown, it is not possible to chemically derive the major product from first principles.

What is needed to solve it

To determine the major product in haloalkanes/haloarenes, we would normally need:

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

Without these, one cannot analyze whether the reaction proceeds by:

• $S_N1$
• $S_N2$
• elimination
• nucleophilic substitution in haloarenes
• rearrangement
• Grignard formation, etc.

Comparison with stored answer

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

So, strictly speaking, I do not have enough information to agree with the stored answer on chemical grounds.

Please provide the reaction figure or the full option structures so I can solve it step-by-step properly.