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: Pathology
[{'content': 'Dilated cardiomyopathy is due to \nSelect and explain. \nA. Defective desmosomes, B. Mutated β myosin heavy chain, C. Mutated titin, D. Mutated osteoglycin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Option a: Arrhythmogenic right ventricular hypertrophy\nOption b: Hypertrophic cardiomyopathy\nOption d: Left ventricular hypertrophy.', 'role': 'assistant'}]