Which row gives the pressure and catalyst used for converting sulfur dioxide into sulfur trioxide in the Contact process?
- A$2\,\text{atm}$ and iron
- B$2\,\text{atm}$ and vanadium(V) oxide
- C$200\,\text{atm}$ and iron
- D$200\,\text{atm}$ and vanadium(V) oxide