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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A child with acute respiratory distress showing hyperinflation of the unilateral lung in X-ray is due to –
assistant
The correct answer is  Sudden onset of respiratory distress with hyperinflation of lung suggest the diagnosis of foreign body aspiration.

"Foreign body aspiration should always be considered as a potential cause of stridor and airway obstruction in children".

Congenital lobar emphysema can also cause respiratory distress with hyperinflation of lung. But congenital lobar emphysema produces respiratory distress immediately after birth i.e. in neonatal periods.