This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiomyopathies, Subject name: Medicine
RCM is caused by all except? 
Select and explain. 
A. Fatty infiltration of myocardium, B. Amyloidosis, C. Ergotamine, D. Carcinoid syndrome
A: Fatty infiltration of myocardium
Answer: A: Fatty infiltration of myocardium 
Explanation: Causes of Restrictive Cardiomyopathy: Amyloidosis Hemochromatosis Fabry's disease Glycogen storage disease (II, III) Radiation Scleroderma Tropical Endomyocardial Fibrosis Hyper-eosinophilic syndrome (Loffler's endocarditis) Carcinoid syndrome Radiation Drugs: e.g., serotonin, Ergotamine