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': 'Which of the following has small representation in somatosensory area of cerebral coex? \nSelect and explain. \nA. Lips, B. Thumb, C. Tounge, D. Trunk', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Trunk region has the smallest representation on the cerebral coex Ref: guyton and hall textbook of medical physiology 12 edition page number:841,842,843', 'role': 'assistant'}]