This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
[{'content': 'Concurrent flexion of both wrists in response to electrical stimulation is characteristic of which area of the nervous system? \nSelect and explain. \nA. Postcentral gyrus, B. Vestibulospinal tract, C. Dentate nucleus, D. Supplementary motor coex', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The supplementary motor area tends to produce bilateral motor responses when stimulated. The other areas would tend to produce unilateral responses.', 'role': 'assistant'}]