Which of the following will racemize in presence of acid or base trace

1.	Which of the following will racemize in presence of acid or base traces in aqueous medium?
Answer» `Me-UNDERSET(O)underset(\|\|)C-underset(CH_(3))underset(\|)OVERSET(CH_(3))overset(\|)C-Ph` `Me-underset(O)underset(\|\|)C-CH_(2)-underset(D)underset(\|)overset(H)overset(\|)C-CH_(3)` `Me-underset(H)underset(\|)overset(ET)overset(\|)C-underset(H)underset(\|)overset(Me)overset(\|)C-underset(O)underset(\|\|)C-Ph` `Ph-underset(O)underset(\|\|)C-underset(CH_(3))underset(\|)overset(H)overset(\|)C-CH_(2)-CH_(3)` Solution :`sp^(2)` carbon of enol form can be ATTACHED from both the side.

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