| I. Removing the combustible substance. |
| II. Cooling the substance to a temperature below its ignition temperature. |
| III. Cutting off the supply of air. |
A) Method I is suitable in case of a building on fire.
B) Method II involves water which works when wood or paper are on fire.
C) Method III involves carbon dioxide gas which is lighter than oxygen and forms a blanket around the air.
D) All of these
Correct Answer: B
Solution :
Method I is not possible in case of a building on fire as the entire building is the combustible substance. Method III involves carbon dioxide which is heavier than oxygen and forms a blanket around the fire.
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