Assertion. Cinnabar is a chemical compound whereas brass is a mixture. – InterviewSolution

1.	Assertion. Cinnabar is a chemical compound whereas brass is a mixture. Reason. Cinnabar always contains 6.25 times as much mercury as sulphur by weight. Brass can be made with widely different ratios of copper and zinc.
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 is not the true explanation of the assetion. If assertion is true, but reason if false If both assertion and reason are false. Answer :A

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