$25\,\text{cm}^3$ of $0.1\,\text{mol dm}^{-3}$ hydrochloric acid exactly neutralise $20\,\text{cm}^3$ of aqueous sodium hydroxide. The reaction equation is shown below: $\text{NaOH} + \text{HCl} \rightarrow \text{NaCl} + \text{H}_2\text{O}$. What concentration does the sodium hydroxide solution have?
- A$0.080\,\text{mol dm}^{-3}$
- B$0.800\,\text{mol dm}^{-3}$
- C$0.125\,\text{mol dm}^{-3}$
- D$1.25\,\text{mol dm}^{-3}$