Assertion (A): During expiration, the intrapulmonary pressure increases above atmospheric pressure. Reason (R): Relaxation of the diaphragm and intercostal muscles reduces the thoracic volume, thereby increasing pressure.
- 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: A
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