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The question consists of 2 statements, an assertion and a reason. The reader must determine whether each statement is true and then whether the reason holds true to the assertion.  Assertion- A. Fire extinguishers stop fire. Reason: R. Combustion cannot take place when there is lots of carbon dioxide in the atmosphere.

The question consists of 2 statements, an assertion and a reason. The reader must determine whether each statement is true and then whether the reason holds true to the assertion.  Assertion- A. Fire extinguishers stop fire. Reason: R. Combustion cannot take place when there is lots of carbon dioxide in the atmosphere. Correct Answer Both A and R are true and R is correct explanation of A.

Fire occurs when there is adequate oxygen in the atmosphere but extinguishers have carbon dioxide in them and when they are used they cut off the oxygen supply and therefore control the fire. Hence, only option 1 is correct.

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