Which of the following is not optically activ | vedclass

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(D) molecule is optically active if it contains at least one chiral center (a carbon atom bonded to four different groups).$1$. Alanine $(CH_3CH(NH_2)

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$2, 2-$Dimethylbutanoic acid

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(D) molecule is optically active if it contains at least one chiral center (a carbon atom bonded to four different groups).$1$. Alanine $(CH_3CH(NH_2)COOH)$ has a chiral carbon.$2$. Lactic acid $(CH_3CH(OH)COOH)$ has a chiral carbon.$3$. Malic acid $(HOOCCH_2CH(OH)COOH)$ has a chiral carbon.$4$. $2, 2-$Dimethylbutanoic acid $(CH_3CH_2C(CH_3)_2COOH)$ has no chiral carbon because the $C-2$ atom is bonded to two identical methyl groups. Therefore,it is not optically active.

Which of the following is not optically active?

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