The question as provided is incomplete: the reaction scheme/image is missing, and all four options A–D are blank. Without the reactant(s), reagent(s), conditions, or the option structures, the major product cannot be determined from chemistry principles.

Step-by-step assessment

1. What is needed to solve this question?
   For a product-prediction question in aldehydes, ketones, and carboxylic acids, we need:

   • the starting compound,
   • the reagent(s)/condition(s),
   • and/or the option structures.

2. What is actually available?

   • Only the statement: "The major product obtained in the following reaction is:"
   • Options listed as:
     • A:
     • B:
     • C:
     • D: with no structures/text.

3. Can the product be uniquely predicted?
   No. Many different reactions in this chapter can give entirely different products depending on reagents such as:

   • Grignard reagents,
   • Tollens’ reagent,
   • Clemmensen/Wolff–Kishner reduction,
   • Aldol condensation,
   • Cannizzaro reaction,
   • HVZ reaction,
   • oxidation/reduction conditions, etc.

4. Can the options be evaluated systematically?
   No, because the options are blank.

Conclusion

The problem is unsolvable from the provided data. I therefore cannot legitimately derive option A as the correct answer.

If you send the reaction image or type the reaction and option structures, I can solve it fully step-by-step.