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: Medicine
[{'content': 'Wide split S2 occurs in: \nSelect and explain. \nA. VSD (ventricular septal defect), B. Mitral stenosis, C. ASD (Atrial septal defect), D. c ansd a both', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer is C >A (ASD > VSD) Wide physiological splitting may be seen in both VSI) and AS!) but it is more characteristic of ASD. ASD is the single best anterior of choice.', 'role': 'assistant'}]