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(C) An asymmetric carbon atom (chiral center) is a carbon atom bonded to four different groups.$1$. $2$-chlorobutane $(CH_3-CHCl-CH_2-CH_3)$: The $C_2

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$3$

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(C) An asymmetric carbon atom (chiral center) is a carbon atom bonded to four different groups.$1$. $2$-chlorobutane $(CH_3-CHCl-CH_2-CH_3)$: The $C_2$ carbon is bonded to $-H, -Cl, -CH_3, -CH_2CH_3$. It is asymmetric.$2$. Glycine $(NH_2-CH_2-COOH)$: No carbon is bonded to four different groups.$3$. Alanine $(CH_3-CH(NH_2)-COOH)$: The $C_2$ carbon is bonded to $-H, -NH_2, -CH_3, -COOH$. It is asymmetric.$4$. Styrene $(C_6H_5-CH=CH_2)$: No $sp^3$ hybridized carbon is bonded to four different groups.$5$. Menthol: It contains multiple chiral centers (asymmetric carbons).Thus,compounds $1, 3,$ and $5$ possess asymmetric carbon atoms. The total number is $3$.

Observe the structures of the following compounds:
$1$. $2$-chlorobutane
$2$. Glycine $(NH_2CH_2COOH)$
$3$. Alanine $(CH_3CH(NH_2)COOH)$
$4$. Styrene $(C_6H_5CH=CH_2)$
$5$. Menthol
The total number of structures/compounds which possess asymmetric carbon atoms is $....$

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Observe the structures of the following compounds:$1$. $2$-chlorobutane$2$. Glycine $(NH_2CH_2COOH)$$3$. Alanine $(CH_3CH(NH_2)COOH)$$4$. Styrene $(C_6H_5CH=CH_2)$$5$. MentholThe total number of structures/compounds which possess asymmetric carbon atoms is $....$