Which of the following statements is correct?

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(D) An amino acid is optically active if it contains a chiral carbon atom. In the general structure of an amino acid,$R-CH(NH_2)-COOH$,the central car

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All amino acids except glycine are optically active.

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(D) An amino acid is optically active if it contains a chiral carbon atom. In the general structure of an amino acid,$R-CH(NH_2)-COOH$,the central carbon is chiral if the side chain $R$ is not a hydrogen atom. Glycine is the simplest amino acid where $R = H$. Thus,the structure of glycine is $H_2N-CH_2-COOH$,which has two identical hydrogen atoms attached to the central carbon,making it achiral. Therefore,all amino acids except glycine are optically active.

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