\textbf{231 --} If the molar ratio of hydronium ions to hydroxide ions in a strong base solution is $10^{10}$, how many moles of HCl are needed to neutralize 100 mL of this solution?
$$
(1)\quad 10^{-2} \qquad (2)\quad 5\times10^{-2} \qquad (3)\quad 10^{-3} \qquad (4)\quad 5\times10^{-3}
$$