During an experiment, $1\,\text{cm}^3$ of a gaseous hydrocarbon, $Z$, needs $4\,\text{cm}^3$ of oxygen for complete combustion, producing $3\,\text{cm}^3$ of carbon dioxide. Every gas volume is taken at r.t.p. Which formula represents $Z$?
- A$\text{C}_2\text{H}_2$
- B$\text{C}_2\text{H}_4$
- C$\text{C}_3\text{H}_4$
- D$\text{C}_3\text{H}_8$