An incomplete equation for the reaction of ethyne, $\text{C}_2\text{H}_2$, with oxygen is given below. $2\text{C}_2\text{H}_2(g) + \ldots \text{O}_2(g) \rightarrow \ldots \text{CO}_2(g) + \ldots \text{H}_2\text{O}(g)$ After the equation has been balanced, what should the correct value of $\text{O}_2(g)$ be?
- A2
- B3
- C4
- D5