Đáp án C
$CH_3-CH_2-CH_2-CH_2-CH_3 + Cl_2 \to CH_2Cl-CH_2-CH_2-CH_2-CH_3 + HCl$
$CH_3-CH_2-CH_2-CH_2-CH_3 + Cl_2 \to CH_3-CHCl-CH_2-CH_2-CH_3 + HCl$
$CH_3-CH_2-CH_2-CH_2-CH_3 + Cl_2 \to CH_3-CH_2-CHCl-CH_2-CH_3$
Đúng 2
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