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 obstructive cardiomyopathy, except- 
Select and explain. 
A. Systolic dysfunction, B. Concentric hypertrophy, C. Diastolic dysfunction, D. Double apical impulse
A: Systolic dysfunction
Answer: A: Systolic dysfunction 
Explanation: None