Among the given ketones,the one which does no | vedclass

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(B) For a ketone to enolize,it must have at least one $\alpha$-hydrogen atom.$(I)$ Bicyclo[$2.2$.$1$]heptan$-2-$one has $\alpha$-hydrogens and can for

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$(II)$

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(B) For a ketone to enolize,it must have at least one $\alpha$-hydrogen atom.$(I)$ Bicyclo[$2.2$.$1$]heptan$-2-$one has $\alpha$-hydrogens and can form an enol.$(II)$ $3,3$-dimethylbicyclo[$2.2$.$1$]heptan$-2-$one has no $\alpha$-hydrogen at the $C-3$ position. However,it has an $\alpha$-hydrogen at the bridgehead position $(C-1)$. According to Bredt's rule,the formation of a double bond at the bridgehead of a small bicyclic system is highly unstable. Thus,it does not enolize.$(III)$ Cyclohexa-$2,4$-dienone has $\alpha$-hydrogens and can enolize to form phenol.Therefore,the correct answer is $(II)$.

List-$I$ (Type of reaction)	List-$II$ (Final Product)
$A$. Reimer-Tiemann reaction	$I$. Chlorobenzene
$B$. Etard reaction	$II$. Salicylaldehyde
$C$. Sandmeyer reaction	$III$. Benzaldehyde
$D$. Friedel-Crafts reaction	$IV$. Acetophenone

Among the given ketones,the one which does not enolize is:

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