Which row contains only correct comparisons of magnesium and barium?
- Afourth ionisation energy: magnesium higher, barium lower; reaction with water: magnesium faster, barium slower
- Bfourth ionisation energy: magnesium higher, barium lower; reaction with water: magnesium slower, barium faster
- Cfourth ionisation energy: magnesium lower, barium higher; reaction with water: magnesium faster, barium slower
- Dfourth ionisation energy: magnesium lower, barium higher; reaction with water: magnesium slower, barium faster