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Match the instruments in Group I with their corresponding measurements in Group II.

Group I Group II

P. Manometer 1. Agitator speed

Q. Rotameter 2. Pressure difference

R. Tachometer 3. Cell number

S. Hemocytometer 4. Air flow rate

A. P-4, Q-1, R-2, S-3

B. P-3, Q-4, R-1, S-2

C. P-2, Q-4, R-1, S-3

D. P-2, Q-1, R-4, S-3

Answer: Option C

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