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
Area 4 of the coex corresponds to? 
Select and explain. 
A. Primary motor area, B. Primary sensory area, C. Visual coex, D. None of the above
A: Primary motor area
Answer: A: Primary motor area 
Explanation: 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.