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': 'Most plausible factor for dental implant fracture \nSelect and explain. \nA. Peri-implantitis, B. Bending overloads, C. Non-passive fit prosthesis, D. Manufacturing imperfections', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]