Group I lists some physical phenomena while Group II gives some physical parameters. Match the phenomenon with the corresponding parameter
| Group I | Group II |
| P. Doppler broadening | 1. Moment of inertia |
| Q. Natural broadening | 2. Refractive index |
| R. Rotational spectrum | 3. Lifetime of the energy level |
| S. Total internal reflection | 4. Pressure |
A. P-4, Q-3, R-1, S-2
B. P-3, Q-2, R-1, S-4
C. P-2, Q-3, R-4, S-1
D. P-1, Q-4, R-2, S-3
Answer: Option A

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