The reaction involves a chemical transformation using MeLi (methyl lithium) as a reagent. Methyl lithium is a strong base and a nucleophile, commonly used for adding methyl groups to electrophiles.

1. Identify the Functional Groups: The given compound has an amide group (O=C-NHPh) attached to a cyclic compound, and a double bond. It's important to recognize the possible reactive sites.
2. React with MeLi: MeLi acts as a nucleophile due to the high electronegativity of lithium, making the carbon in the MeLi species nucleophilic.
3. Nucleophilic Addition: The nucleophilic methyl group from MeLi will attack the carbonyl carbon of the amide group.
4. Tautomerization: Following the nucleophilic addition, tautomerization may occur. The amide can rearrange, leading to the formation of different isomers.
5. Product Formation: After considering possible rearrangements and stability, the major product is the one where the methyl group has been successfully added to the amide's carbonyl carbon, forming a tertiary alcohol.

The correct major product for this reaction is:

This compound is formed by the addition of the methyl group from MeLi to the carbonyl carbon of the amide, followed by appropriate rearrangements.