This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
All are true about hyperophic obstructive cardiomypathy except- 
Select and explain. 
A. Asymmeric hyperophy of septum, B. Systolic motion of anterior leaflet, C. Left ventricle outflow obstruction, D. Beta blockers are not effective
D: Beta blockers are not effective
Answer: D: Beta blockers are not effective 
Explanation: Ref:Harrison&;s 19th E pg 1568. Beta-blockers are the drug of choice for HOCM. Decreasing the contractility of hea prevents the hyperophied septum coming in contact with the anterior leaflet of the mitral Valve. Hence reducing the obstruction.