1 MCQs in Pediatrics for NEET PG
A 4-month-old unimmunized infant from rural India presents with a 3-week history of paroxysmal coughing spells. The mother reports that after each bout of rapid coughs, the infant takes a deep, forced inspiration that produces a characteristic high-pitched sound before the next coughing fit begins. The structure marked **C** in the diagram represents this clinical finding. Which of the following best explains the mechanism underlying this sound?
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