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: Anatomy
[{'content': 'Area 4 of the coex corresponds to: \nSelect and explain. \nA. Primary motor area, B. Primary sensory area, C. Visual coex, D. None of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: The primary motor coex (MI) corresponds to the precentral gyrus (area 4). It is the area of coex with the lowest threshold for eliciting contralateral muscle contraction by electrical stimulation. Ref: Gray's anatomy 40th edition, Chapter 21.", 'role': 'assistant'}]