Match the unit operation in Group I with its corresponding principal in Group II:
| Group I | Group II |
| P. Jigging | 1. Modification of surface tension |
| Q. Tabling | 2. Difference in density |
| R. Heavy media separation | 3. Differential initial acceleration |
| S. Flotation | 4. Differential lateral movement |
A. P-3, Q-4, R-2, S-1
B. P-2, Q-3, R-1, S-4
C. P-4, Q-2, R-3, S-1
D. P-1, Q-3, R-2, S-4
Answer: Option A
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