Match the following in the context of underground mine environment
| Instrument | Measuring parameter |
| P. Haldane apparatus | I. Humidity |
| Q. Godbert-Greenwald apparatus | II. Air velocity |
| R. Hygrometer | III. Mine air composition |
| S. Anemometer | IV. Ignition point temperature |
A. P-II, Q-I, R-III, S-IV
B. P-III, Q-IV, R-I, S-II
C. P-IV, Q-II, R-III, S-I
D. P-I, Q-III, R-IV, S-II
Answer: Option B
This Question Belongs to Mining Engineering >> Mine Ventilation
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