Four solutions, each with concentration $0.1\,\text{mol dm}^{-3}$, were examined using a pH meter. The outcomes are shown: acid 1: $\text{CH}_3\text{CO}_2\text{H}$, pH $4$ acid 2: $\text{HNO}_3$, pH $1$ base 1: $\text{CH}_3\text{NH}_2$, pH $11$ base 2: $\text{NaOH}$, pH $14$ Which statements account for these results?
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct