Pollutant oxide Y, which contains non-metallic element X, is produced in a car engine. In the atmosphere, Y undergoes further oxidation to Z. In this additional oxidation, $1$ mol of Y reacts with $0.5$ mol of gaseous oxygen molecules. X may be nitrogen or sulfur. Which statements about X, Y and Z could be correct?
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct