This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Following is true of eventration of diaphragm -a) It is a developmental defectb) Early surgery is treatmentc) Defect is usually musculard) Diagnosed mostly clinically \nSelect and explain. \nA. a, B. ac, C. ad, D. b', 'role': 'user'}, {'content': 'Answer: B \nExplanation: • Abnormally elevated position of diaphragm from paralysis or atrophy of the muscle fibers.\n• May be congenital anomaly\xa0caused by failure of muscularization\xa0of the dome of hemidiaphragm, or it may be acquired as a result of dysfunction of the phrenic nerve related to the neuromuscular disease or trauma including operative trauma.\n• Birth trauma: MC cause of acquired diaphragmatic eventration, usually related to breech presentation.\n• Most commonly diagnosed in pediatric patients\n• More common in males and affect left hemidiaphragm more frequently.\nTreatment\n• Diaphragmatic plication is preferred over resection.\n• Surgery to fix the diaphragm in inspiration\xa0so the paradoxical movement and mediastinal shift are minimized.', 'role': 'assistant'}]