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
Which of the following is the most common identifiable cause for Restrictive cardiomyopathy 
Select and explain. 
A. Alcohol, B. Hemochromatosis, C. Amyloidosis, D. Sarcoidosis
C: Amyloidosis
Answer: C: Amyloidosis 
Explanation: Ref Harrison 19 th ed pg 1569 Amyloidosis is the major cause of restrictive cardiomyopathy . Several proteins can self-assemble to form the beta-sheets of amyloid proteins, which deposit with differ- ent consequences depending on the type of protein.