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
[{'content': 'Most common cause of dilated cardiomyopathy is ? \nSelect and explain. \nA. Alcohol, B. Viral infection, C. PREGNANCY, D. Metabolic disease', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cardiomyopathy is disease in which the hea muscle becomes weakened, stretched, or has another structural problem. Dilated cardiomyopathy is a condition in which the hea muscle becomes weakened and enlarged. As a result, the hea cannot pump enough blood to the rest of the body. There are many types of cardiomyopathy. Dilated cardiomyopathy is the most common form. the most common cause is alcohol Ref Harrison 20th edition pg 1445', 'role': 'assistant'}]