AIIMS 2019 Botany Vitamins Assertion Reason Question
Assertion: Amount of cyanocobalamine required daily is 3 mcg Reason: Its deficiency causes pernicious anaemia
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false.
Correct Answer
Detailed Explanation
Option B is correct because the assertion that the daily requirement of cyanocobalamin (vitamin B₁₂) is 3 mcg is true, as this is the recommended dietary allowance for adults. The reason provided, that its deficiency causes pernicious anemia, is also true; however, it does not directly explain the assertion, as pernicious anemia is a specific condition resulting from a lack of intrinsic factor needed for vitamin B₁₂ absorption, rather than the daily requirement itself.
Option A is incorrect because, while both statements are true, the reason does not adequately explain the assertion. Option C is incorrect because both statements are true. Option D is incorrect as both the assertion and reason are factual.
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