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
Restrictive and constrictive cardiomyopathy occurs together in 
Select and explain. 
A. Radiation, B. Adriamycin, C. Post cardiotomy, D. Amyloidosis
D: Amyloidosis
Answer: D: Amyloidosis 
Explanation: The etiologies of RCM may be grouped into broad categories as follows: Primary/idiopathic: Endomyocardial fibrosis (EMF), loeffler eosinophilic endomyocardial disease Secondary: Infiltrative, amyloidosis (the most common cause of RCM in the United States), sarcoidosis , progressive systemic sclerosis (scleroderma) , hemochromatosis, , carcinoid hea disease, glycogen storage disease of the hea, radiation/treatment induced, metastatic malignancy, anthracycline toxicity Ref Davidson 23rd edition pg 467