This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
[{'content': 'Somatosensory area I largest representation is for \nSelect and explain. \nA. Arm, B. Leg, C. Back, D. Head', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Coical areas for sensation from trunk and back are small, whereas large areas are concerned with impulses from hand and pas of mouth. And from the figure 11-4 it is evident that area for hand is more than face. Ref: Ganong&;s review of medical physiology; 23rd edition; pg:175', 'role': 'assistant'}]