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': 'Amyotrophic lateral sclerosis involve: \nSelect and explain. \nA. Anterior horn cell, B. Posterior horn cell, C. Dorsal root ganglia, D. Ventral root ganglia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Anterior Horn Cells):', 'role': 'assistant'}]