When ammonia gas dissolves in water, a reversible reaction occurs. $\text{NH}_3(\text{g}) + \text{H}_2\text{O}(\text{l}) \rightleftharpoons \text{NH}_4^+(\text{aq}) + \text{OH}^-(\text{aq})$ Which statements are correct?
- A1, 2 and 3
- B1 and 3 only
- C1 only
- D2 and 3 only