CBSE 2026 · Region 5 · Set 2 · Q15 · 1 mark
Assertion (A) : The endometrium undergoes cyclic changes during the menstrual cycle.
Reason (R) : Perimetrium contracts strongly during delivery of the baby.
Official answer
From CBSE’s own marking scheme for this paper.
(C)
Assertion (A) is true, but Reason (R) is false.
Human ReproductionMenstrual CycleUnderstandassertion_reasonmedium
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CBSE Class 12 Biology past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.