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': 'Which of the following is a complete sulcus \nSelect and explain. \nA. Central sulcus, B. Paracentral sulcus, C. Collateral sulcus, D. Post calcarine sulcus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Collateral sulcus and calcarine sulcus are complete sulcus', 'role': 'assistant'}]