There are three different substances with the formula C₄H₈ that do not contain a ring. What are they?
a) Butene, Isobutene, 1,2-Butadiene
b) Butane, 2-Methylpropene, Cyclobutane
c) Ethylene, Propylene, Butadiene
d) 1-Butyne, 2-Butyne, 1,3-Butadiyne