Which of the following exhibits tautomerism?

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(B) Tautomerism is exhibited by compounds containing at least one $\alpha$-hydrogen atom attached to an $sp^3$ hybridized carbon adjacent to a polar g

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$(CH_3)_2CHNO_2$

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(B) Tautomerism is exhibited by compounds containing at least one $\alpha$-hydrogen atom attached to an $sp^3$ hybridized carbon adjacent to a polar group like $C=O$,$C=N$,or $NO_2$.$A$: The structure is an oxime,which exhibits geometrical isomerism,not tautomerism.$B$: $(CH_3)_2CHNO_2$ has one $\alpha$-hydrogen atom on the carbon attached to the $NO_2$ group,thus it exhibits tautomerism.$C$: This is an enol form,which is already a tautomer.$D$: $(CH_3)_3CCHO$ has no $\alpha$-hydrogen atom,so it does not exhibit tautomerism.

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