The diagram illustrates several uses of compounds of Group II elements. Which of the numbered links are accurate?
- Acalcium carbonate: 1, 2 and 3; magnesium oxide: 4 and 5 only
- Bcalcium carbonate: 1, 2 and 3; magnesium oxide: 5 and 6 only
- Ccalcium carbonate: 2 and 3 only; magnesium oxide: 4 only
- Dcalcium carbonate: 2 and 3 only; magnesium oxide: 6 only