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: Surgery
In patients with hyperophic cardiomyopathy maximum mutations are found in which gene: 
Select and explain. 
A. . b - myosin heavy chain, B. Elastin, C. . a - tropomyosin, D. Troponin T
A: . b - myosin heavy chain
Answer: A: . b - myosin heavy chain 
Explanation: b - Myosin heavy chain Mutations in gene for b - Mysoin heavy chain are associated with 40% of the families with hyperophic cardiomyopathy. Troponin T mutations - 15% of the families a - tropomyosin mutations ~5% of the families