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
The most common toxin causing dilated cardiomyopathy is 
Select and explain. 
A. Alcohol, B. Chemotherapeutic agents, C. Heavy metal, D. Occupational exposure
A: Alcohol
Answer: A: Alcohol 
Explanation: Ref Harrison 19 th ed pg 1558 Toxic 1.Alcohol 2.Catecholamin: amphetamines, cocaine 3.3.Chemotherapeut agents (anthracyclines, trastuzumab) 4.Interferon 5.Other therapeutic agents (hydroxychloroquine, chloroquine)6.Dru of misuse (emetine, anabolic steroids) 7. metals: lead, mercury Occupational exposure: hydrocarbons, arsenicals.