What is the major product of the following reaction sequence?

Question

Quizplus · Accepted Answer

The first step is an acid-catalyzed hydration of the alkyne, which leads to the formation of an enol intermediate. This is then tautomerized to the more stable ketone. The second step is a Grignard reaction, where the ketone is converted to its corresponding alcohol. The Grignard reagent attacks the carbonyl carbon and adds a new carbon chain. The major product is therefore the alcohol with an extra carbon chain attached to it, which corresponds to choice B.

What Is the Major Product of the Following Reaction Sequence