Halogenation of alkanes

Exercise 4

How many products provides chlorination of propane? Give their condensed formulas!

A) $CH_3-CH_2-CHCl_2$ B) $CH_3-CHCl-CH_2Cl$ C) $CH_2Cl-CH_2-CH_2Cl$ D) $CH_3-CCl_2-CH_3$

A new chlorination leads to several trichloropropanes. What dichloropropane gives three trichloropropanes, or two, or one?

A) et B): three C): two D): one

For which dichloropropanes, one trichloropropane obtained is it the same?

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B) and D) may produce $CH_3-CCl_2-CHCl$