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
Heart failure with preserved ejection fraction - 
Select and explain. 
A. Dilated cardiomyopathy, B. Restrictive cardiomyopathy, C. MI, D. Hypertension
B: Restrictive cardiomyopathy
Answer: B: Restrictive cardiomyopathy 
Explanation: None