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: Pathology
[{'content': 'Dilated cardiomyopathy, gene altered is? \nSelect and explain. \nA. Dystrophin, B. Titin, C. Sarcomere, D. Mitochondrial genes', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Titin(Ref: Robbins 9th/pg 565-566; 8th/pg 573-574)DCM is familial in at least 30% to 50% of casesAutosomal dominant inheritance is the predominant pattern;Most common- mutations in TTN, a gene that encodes titin (20% of all cases of DCM)', 'role': 'assistant'}]