The $[OH^{-}]$ in a solution is $1 \times 10^{-12} \ mol \ dm^{-3}$. What is the concentration of $H^{+}$ ions?
- A$0.1 \ mol \ dm^{-3}$
- B$1.0 \ mol \ dm^{-3}$
- C$2.0 \ mol \ dm^{-3}$
- D$0.01 \ mol \ dm^{-3}$
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