The question statement appears incomplete: the reaction scheme/structures are missing, and all four options $A, B, C, D$ are blank.

Because of that, the major product cannot be determined from the given information.

Step-by-step assessment

1. To solve an organic chemistry product-based MCQ, we need:

   • the reactant structure(s),
   • the reagent(s)/conditions,
   • and the option structures.

2. In the provided question, none of these are visible. The prompt only says:

   "Major product formed in the following reaction is a mixture of :" but the actual reaction image/equation is absent.

3. Since the organic transformation is not shown, it is impossible to infer:

   • whether the reaction involves substitution, elimination, rearrangement, oxidation, reduction, cleavage, or ether formation,
   • what kind of alcohol/phenol/ether is involved,
   • and what "mixture" is being referred to.

4. Therefore, no chemically valid derivation of the correct option can be made from the supplied data.

Conclusion

The problem is not solvable as provided because the key reaction and options are missing.

If you upload the reaction image or type the reactant/reagents/options, I can solve it fully and identify the correct answer.