The question image/reaction scheme and the option structures are missing. The prompt only shows:

• "The major product in the following reaction is :"
• Options $A, B, C, D$ are blank

So the actual reaction and product choices are not available. Without the substrate, reagent/conditions, and option structures, the major product cannot be determined.

What is needed

To solve this, I would need at least one of the following:

1. The reaction scheme/image, or
2. The reactant and reagent/conditions written in text, and
3. The structures corresponding to options $A, B, C, D$

Conclusion

Because the essential chemical information is missing, the answer cannot be derived from the provided data. Therefore I cannot legitimately verify whether option $A$ is correct.