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: Dental
[{'content': 'In Periapical lesions of average size, time needed for osteogenesis is: \nSelect and explain. \nA. 1-2 months, B. 2-6 months, C. 6-12 months, D. 2 Weeks', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]