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': 'Pain sensation from the lateral extremities is transmitted by: \nSelect and explain. \nA. Spino thalamic tract, B. Dorsal column, C. Corticospinal tract, D. Spinocerebellar tract', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]