Given below are two statements, one labeled as Assertion (A) and the other labeled as Reason (R). **Assertion (A):** A diamond shines brilliantly when properly cut, whereas a similarly cut glass piece does not exhibit the same level of brilliance. **Reason (R):** The refractive index of diamond is much higher than that of glass, resulting in a smaller critical angle which traps light inside through multiple total internal reflections. Select the correct answer using the codes given below:

Options:

• A: Both A and R are true and R is the correct explanation of A.
• B: Both A and R are true but R is not the correct explanation of A.
• C: A is true but R is false.
• D: A is false but R is true.

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