Fire extinguishing methods are:-

Cooling, smothering only

cooling smothering, starvation and by interrupt the chemical chain reaction,

both A & B

none is correct

Fire extinguishing methods are cooling smothering, starvation, and by interrupting the chemical chain reaction
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All fires can be extinguished by cooling, smothering, starving, or interrupting the combustion process to extinguish the fire.
One of the most common methods of extinguishing a fire is by cooling it with water
The five common methods of extinguishing fires