(A): Iron pyrite is used in the extraction of iron and releases pollutants like sulphur dioxide.
(R): Ores which are abundant with nonmetals produce polluting gases.

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Both A & R are true, $R$ is the correct explanation of A

$A$ is false, $R$ is true

$A$ is true, $R$ is false

Both A & R are true, $R$ is not correct explanation of $A$

answer is A.

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Detailed Solution

${FeS}_{2} + O_{2} \to$ ${Fe}_{2} O_{3}$ + ${SO}_{2}$ and ${SO}_{2}$ is a pollutant. Assertion is correct.
sulphur is non-metal. Reason is also correct.

Hence, Option(A) is the required answer.

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