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: Physiology
[{'content': 'UMN includes \nSelect and explain. \nA. Pyramidal cells, B. Peripheral nerves, C. Anterior horn cells, D. Glial cells', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Upper motor neuron- Pyramidal cells, corticospinal tract, corticobulbar tract, extrapyramidal tracts.', 'role': 'assistant'}]