Which of the following compounds on hydration | vedclass

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(C) The hydration of alkynes in the presence of $H_2SO_4$ and $HgSO_4$ is known as Kucherov's reaction.Ethyne $(CH \equiv CH)$ is the only alkyne that

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$CH \equiv CH$

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(C) The hydration of alkynes in the presence of $H_2SO_4$ and $HgSO_4$ is known as Kucherov's reaction.Ethyne $(CH \equiv CH)$ is the only alkyne that produces an aldehyde ($CH_3CHO$,acetaldehyde) upon hydration.All other terminal alkynes produce ketones due to the formation of a more stable carbocation intermediate or the specific tautomerization of the enol form.For $CH \equiv CH + H_2O$ $\xrightarrow{H_2SO_4/HgSO_4} [CH_2=CH-OH]$ $\rightarrow CH_3-CHO$.

Which of the following compounds on hydration (addition of $H_2O$) with $H_2SO_4/HgSO_4/H_2O$ gives an aldehyde as the major product?

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