1.

Assertion. Carbon monoxide is highly toxic. Reason. Carbon monoxide forms a stable complex with haemoglobin present in red blood cells.

Answer»

If both ASSERTION and REASON are TRUE, and reason is the true EXPLANATION of the assertion.
If both assertion and reason are true, but reason not is the true explanation of the assertion.
If assertion is true, but reason is false.
If both assertion and reason are false.

Answer :A


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