This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiomyopathies, Subject name: Medicine
[{'content': 'All are the high-risk factors for sudden cardiac death in hyperophic cardiomyopathy except: \nSelect and explain. \nA. Family history of sudden cardiac death, B. Non-sustained Ventricular tachycardia on cardiac monitoring, C. Left ventricular septal thickness of 2-3cm, D. Abnormal drop in systolic blood pressure', 'role': 'user'}, {'content': 'Answer: C \nExplanation: High risk factors for Sudden cardiac death in HOCM -H/o cardiac arrest, sustained ventricular tachycardia -Syncope (non-vagal) -Spontaneous non sustained ventricular tachycardia -LV thickness > 3 cm -Abnormal fall in SBP', 'role': 'assistant'}]