Assertion-Reason: Ventricle Wall Thickness
Central Board of Secondary Education 2026 Slot 1 · BIO · Medium · Life Processes · 1 mark
Assertion (A): Walls of the ventricles are thicker than those of the atria. Reason (R): Thick walls of the ventricles help in preventing the backflow of blood.
Choose the correct option: (A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A). (B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A). (C) Assertion (A) is true, but Reason (R) is false. (D) Assertion (A) is false, but Reason (R) is true.
- A.
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
- B.
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
- C.
Assertion (A) is true, but Reason (R) is false.
- D.
Assertion (A) is false, but Reason (R) is true.
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