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': 'A 6 year old patient reports with greenish blue swelling distal to deciduous 2nd molar. Treatment would be: \nSelect and explain. \nA. Surgical excision of flap, B. Bone graft, C. No treatment, only observation, D. Injecting proteolytic solution in the area', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]