Among the following,the achiral amino acid is

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(C) An amino acid is achiral if it does not possess a chiral center (a carbon atom bonded to four different groups).Glycine is the only naturally occu

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$2-$Hydroxymethyl serine

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(C) An amino acid is achiral if it does not possess a chiral center (a carbon atom bonded to four different groups).Glycine is the only naturally occurring achiral amino acid because its side chain is a hydrogen atom,making the $\alpha$-carbon bonded to two identical hydrogen atoms.Among the given options,$2-$hydroxymethyl serine (also known as isoserine derivative or similar structure) has two identical $-CH_2OH$ groups attached to the $\alpha$-carbon,making it achiral.Therefore,the correct option is $C$.

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