This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Which protein is defective in dilated Cardiomyopathy? 
Select and explain. 
A. Actin, B. Myosin, C. Troponin, D. Dystrophin
D: Dystrophin
Answer: D: Dystrophin 
Explanation: One of the cause is mutations in dystrophin.