Q. Question
On the reaction of an alkyne with a reagent, the above given compound is formed. Which is the correct pair of an alkyne and a reagent from the following?

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Solution:

The given carbonyl compound can be produced by oxymercuration-demercuration reaction of alkynes. It is basically the markovnikov addition of water to alkyne. The product enol tautomerises to give the given ketone as the final product.
Solution