This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiomyopathy & Pericarditis, Subject name: Medicine
Most common cause of dilated cardiomyopathy is? 
Select and explain. 
A. Alcohol, B. Viral infection, C. Pregnancy, D. Metabolic disease
A: Alcohol
Answer: A: Alcohol 
Explanation: Ans. (a) AlocholRef: Braundwald's Heart Disease Ninth edition, Chapter 64