This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Stomach & Duodenum, Subject name: Surgery
A 25-year-old man arrives in the emergency department in respiratory distress following a motor vehicle collision. A chest x-ray shows abdominal viscera in the left thorax. What is the most likely diagnosis? 
Select and explain. 
A. Traumatic rupture of the diaphragm, B. Sliding esophageal hernia, C. Short esophagus with intrathoracic stomach, D. Rupture of the esophagus
A: Traumatic rupture of the diaphragm
Answer: A: Traumatic rupture of the diaphragm 
Explanation: Blunt trauma is the most common cause of diaphragmatic rupture. Associated injuries are common. In blunt trauma, the left diaphragm is ruptured more frequently than the right. The stomach, spleen, colon, and omentum may enter the left pleural cavity. Diaphragmatic injury without herniation of abdominal contents is difficult to diagnose. Patients may present with symptoms many years after the initial trauma. Early surgery is indicted.