This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Pathology
Dystrophin is lacking in 
Select and explain. 
A. Polio, B. Duchenne's muscular dystrophy, C. Peroneal muscular atrophy, D. None of the above
B: Duchenne's muscular dystrophy
Answer: B: Duchenne's muscular dystrophy 
Explanation: Duchenne muscular dystrophy is caused due to mutation in the dystrophin gene. Loss of fuction of dystrophin gene located on the sho arm of X chromosome. Dystrophin is a very large protein found in the skeletal and cardiac miscle, and peripheral nerves. Robbins basic pathology 9th edition page no 802