Which among the following alpha-amino acids d | vedclass

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(D) The general structure of an $\alpha$-amino acid is $R-CH(NH_2)-COOH$. In this structure,the $\alpha$-carbon is attached to four different groups (

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Glycine

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(D) The general structure of an $\alpha$-amino acid is $R-CH(NH_2)-COOH$. In this structure,the $\alpha$-carbon is attached to four different groups ($H$,$NH_2$,$COOH$,and $R$) if $R$ is not a hydrogen atom. For glycine,the $R$ group is a hydrogen atom $(H)$. Thus,the structure of glycine is $H_2N-CH_2-COOH$. Since the $\alpha$-carbon in glycine is attached to two identical hydrogen atoms,it is achiral. Therefore,glycine is the only $\alpha$-amino acid that does not have a chiral carbon atom.

Which among the following $\alpha$-amino acids does $NOT$ have a chiral carbon atom?

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