Within a car engine, the non-metallic element X produces the pollutant oxide Y. Additional oxidation of Y to Z happens spontaneously in the atmosphere. In this additional oxidation, $1\text{ mol}$ of Y reacts with $0.5\text{ mol}$ of gaseous oxygen. Which statements concerning X, Y and Z are correct?
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct