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: Pediatrics
[{'content': 'A most Common type of VSD – \nSelect and explain. \nA. Membranous, B. Muscular, C. Multiple, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ventricular septal defect (VSD)\n\nVSD is the most common congenital cardiac lesion.\nVSD is a communication between two ventricles.\nVSD may be located at : -\n\n\nMembranous part of ventricular septum (most common → 90%)\nMuscular septum\nMaybe multiple', 'role': 'assistant'}]