GKFix MCQ Question

What is the radius of the second Bohr orbit in a hydrogen atom?

• A. 1.06 × 10⁻¹⁰ m
• B. 2.12 × 10⁻¹⁰ m
• C. 3.18 × 10⁻¹⁰ m
• D. 4.24 × 10⁻¹⁰ m