GKFix MCQ Question

What is the [OH⁻] in a solution with [H⁺] = 1 × 10⁻⁴ M at 298 K?

• A. 1 × 10⁻⁴ M
• B. 1 × 10⁻⁷ M
• C. 1 × 10⁻¹⁰ M
• D. 1 × 10⁻¹⁴ M