extinguishers help extinguish fires by cutting the supply of oxygen.

Carbon dioxide

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Oxygen

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Hydrogen

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Solution

The correct option is A Carbon dioxide
Carbon dioxide is heavier than air. When ${CO}_{2}$ extinguisher is used, it replaces the air from the surface of fire and thus cuts the supply of oxygen. This helps in extinguishing the fire.

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$C O_{2}$ extinguishers help extinguish fires by

{CO}_{2}

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