Which chemicals may be used as a fertiliser to supply the three elements required for better plant growth?
- A$(\text{NH}_2)_2\text{CO}$ and $\text{KCl}$
- B$(\text{NH}_4)_2\text{HPO}_4$ and $\text{K}_2\text{SO}_4$
- C$(\text{NH}_4)_2\text{HPO}_4$ and $(\text{NH}_2)_2\text{CO}$
- D$(\text{NH}_2)_2\text{CO}$ and $\text{K}_2\text{SO}_4$