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': 'Spinomuscular atrophy is seen in lesion of- \nSelect and explain. \nA. Anterior horn, B. Peripheral nerve, C. Neuromuscular junction, D. Any of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]