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
All are the high-risk factors for sudden cardiac death in hyperophic cardiomyopathy except: 
Select and explain. 
A. 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
C: Left ventricular septal thickness of 2-3cm
Answer: C: Left ventricular septal thickness of 2-3cm 
Explanation: 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