Most serious injury is at
Answer- A. open pneumothoraxThis is a large open defect in the chest (> 3 cm), leading to equilibration between intrathoracic and atmospheric pressure.Air accumulates in the hemithorax (rather than in the lung) with each inspiration, leading to profound hypoventilation on the affected side and hypoxia.
open pneumothorax
diaphragmatic injury
Flail chest
Single rib fracture