GKFix MCQ Question

What is the value of the universal gas constant R in SI units?

• A. 4.184 J mol⁻¹K⁻¹
• B. 6.022 J mol⁻¹K⁻¹
• C. 1.38 × 10⁻²³ J mol⁻¹K⁻¹
• D. 8.314 J mol⁻¹K⁻¹