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: Surgery
[{'content': 'Type of primary healing among the following is/are: \nSelect and explain. \nA. Contact healing., B. Gap healing., C. Both of the above., D. None.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]