GKFix MCQ Question

What is the speed of light in a medium with refractive index 1.33?

• A. 3.00 × 10⁸ m/s
• B. 2.50 × 10⁸ m/s
• C. 2.26 × 10⁸ m/s
• D. 2.00 × 10⁸ m/s