Answer: Option (C) is the correct answer.
Explanation:
A condensed structure formula is a formula which shows that atoms are bonded through lines.
Propane is an alkane and alkanes have general formula [tex]C_{n}H_{2n+2}[/tex].
A propane molecule contains three carbon atoms and eight hydrogen atoms. It's condensed structure formula is as follows.
[tex]CH_{3}CH_{2}CH_{3}[/tex]