Select the correct condensed structural formula for the given compounds:
Answer variants:
\(CH_3-(CH_2)_5C\) \(\equiv CH\)
\(CH_3=CH_2\)
\(CH_3-CH_2-CH_2-CH_2-CH_2-CH_2-CH_3\)
\(CH_2=CH-(CH_2)_2-CH_3\)
\(CH_3-CH_3-CH_2-CH_3\)
\(CH_3-(CH_2)_3C\) \(\equiv CH\)
1. Heptane -
2. 1-Octyne -
3. 1-Pentene -