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: Pathology
[{'content': 'Most common cause of cellulitis of face is \nSelect and explain. \nA. Trauma, B. Abscess, C. Pericoronitis, D. Bacterial infection', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]