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
All are true regarding hypertrophic cardiomyopathy,Except- 
Select and explain. 
A. Digoxin is helpful, B. Irregular thickness of septa, C. Dynamic obstruction, D. Double apical impulse
A: Digoxin is helpful
Answer: A: Digoxin is helpful 
Explanation: None