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
Which of following is a treatable cause of RCM? 
Select and explain. 
A. Fabry's disease, B. Amyloidosis, C. Endomyocardial fibroelastosis, D. Hyper-eosinophilic syndrome
A: Fabry's disease
Answer: A: Fabry's disease 
Explanation: Enzyme replacement therapy in form of a-galactosidase is used in Fabry's disease. It is manufactured using DNA recombinant technology and can prevent disease progression and reverse some symptoms. * Usual causes of Restrictive cardiomyopathy are untreatable and therefore cardiac transplantation is the only ble option left for all other causes. * The most common cause of RCM is amyloidosis.