Assertion (A): Assertion (A): The urge for breathing is primarily regulated by the concentration of oxygen in the blood. Reason (R): Reason (R): Chemoreceptors in the carotid and aortic bodies are sensitive to changes in pO₂.
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is NOT the correct explanation of A
- CA is true but R is false
- DA is false but R is true
✓ Correct answer: D
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