Which of the following optically active alkan | vedclass

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(C) $1$. An optically active alkane must contain at least one chiral carbon atom (a carbon bonded to four different groups).$2$. Let's analyze the opt

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(C) $1$. An optically active alkane must contain at least one chiral carbon atom (a carbon bonded to four different groups).$2$. Let's analyze the options:- Option $A$: $CH_3-CH_2-C\equiv CH$ is an alkyne,not an alkane.- Option $B$: $CH_3-CH_2-CH(CH_3)-CH_3$ is $2-methylbutane$. It is achiral because it has two identical methyl groups attached to the chiral center.- Option $C$: The structure is $1-cyclopropyl-1-methylethane$. The central carbon is bonded to $H$,$CH_3$,$C_2H_5$,and a cyclopropyl group. Since all four groups are different,it is chiral and optically active. Its formula is $C_6H_{12}$,molecular weight = $72+12 = 84$.- Option $D$: $CH_3-CH_2-CH_2-CH_3$ is $n-butane$,which is achiral.$3$. Thus,the optically active alkane with the lowest molecular weight among the choices is the one in option $C$.

Which of the following optically active alkanes has the lowest molecular weight?

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