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(D) Optical isomerism is exhibited by molecules that possess a chiral center (a carbon atom bonded to four different groups).In the given options,let

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$CH_2=CHCH(OH)CH_3$

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(D) Optical isomerism is exhibited by molecules that possess a chiral center (a carbon atom bonded to four different groups).In the given options,let us analyze the structure of $CH_2=CHCH(OH)CH_3$:This molecule is $but-3-en-2-ol$.The carbon atom at position $2$ is bonded to four different groups: $-H$,$-OH$,$-CH_3$,and $-CH=CH_2$.Since this carbon is chiral,the molecule exhibits optical isomerism.Other options like $CH_3COCH_2CH_3$ (butanone),$CH_3CH_2CH_2CHO$ (butanal),and $(CH_3)_2CHCHO$ ($2$-methylpropanal) do not contain a chiral carbon atom.

Which of the following molecules with the molecular formula $C_4H_8O$ exhibits optical isomerism?

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Statement-$1$: Molecules that are not superimposable on their mirror images are chiral.
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