What is the number of chiral carbon atoms in | vedclass

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(B) The structure of threose is $CHO-CH(OH)-CH(OH)-CH_2OH$. $A$ chiral carbon atom is a carbon atom bonded to four different groups. In the structure

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$Two$

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(B) The structure of threose is $CHO-CH(OH)-CH(OH)-CH_2OH$. $A$ chiral carbon atom is a carbon atom bonded to four different groups. In the structure of threose,the two central carbon atoms (at positions $2$ and $3$) are each bonded to four different groups: $-H$,$-OH$,$-CHO$ (or $-CH_2OH$),and the other chiral carbon. Therefore,there are $2$ chiral carbon atoms in the threose molecule,as indicated by the asterisks $(*)$ in the structure.

What is the number of chiral carbon atoms in threose?

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