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
A 6 year old patient reports with greenish blue swelling distal to deciduous 2nd molar. Treatment would be: 
Select and explain. 
A. Surgical excision of flap, B. Bone graft, C. No treatment, only observation, D. Injecting proteolytic solution in the area
C: No treatment, only observation
Answer: C: No treatment, only observation 
Explanation: None