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
[{'content': 'Kenny Packs were used in the treatment of - \nSelect and explain. \nA. Poliomyelitis, B. Muscular dystrophy, C. Polyneuropathies, D. Nerve Injury', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]