Which amino acid is not optically active?

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Question

(C) An amino acid is optically active if it contains a chiral carbon atom (a carbon atom bonded to four different groups).Glycine has the structure $N

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Glycine

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(C) An amino acid is optically active if it contains a chiral carbon atom (a carbon atom bonded to four different groups).Glycine has the structure $NH_2-CH_2-COOH$.In glycine,the central carbon atom is bonded to two identical hydrogen atoms,meaning it is not a chiral center.Therefore,glycine is the only amino acid among the options that is not optically active.

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