This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiology of Pain, Subject name: Physiology
[{'content': 'The highest degree of pain localization comes from which of the following? \nSelect and explain. \nA. Simultaneous stimulation of free nerve endings and tactile fibers, B. Stimulation of free nerve endings by bradykinin, C. Nerve fibers traveling to the thalamus by way of the paleospinothalamic tract, D. Stimulation of d-type A fibers', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In general, the sensation of pain is poorly localized. However, when a tactile receptor and a pain receptor are stimulated simultaneously, the pain sensation is localized with greater accuracy.', 'role': 'assistant'}]