Which of the following compounds is achiral?

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(C) molecule is achiral if it possesses a plane of symmetry or a center of symmetry,or if it lacks a stereocenter.$A$: $CH_3CH(Br)CH=CH_2$ has a chira

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(C) molecule is achiral if it possesses a plane of symmetry or a center of symmetry,or if it lacks a stereocenter.$A$: $CH_3CH(Br)CH=CH_2$ has a chiral carbon at the second position (bonded to $-H$,$-CH_3$,$-Br$,and $-CH=CH_2$),so it is chiral.$B$: The structure shows a carbon bonded to four different groups ($-OH$,$-H$,$-CH_3$,and $-CH_2CH_2CH_3$),so it is chiral.$C$: The structure represents a meso compound (specifically a form of tartaric acid derivative). It contains a plane of symmetry passing through the center of the molecule,making it achiral.$D$: The structure shows a carbon bonded to four different groups ($-H$,$-CH_3$,$-OH$,and $-Br$),so it is chiral.Therefore,the achiral compound is $C$.

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