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': 'Patients on oral bisphosphonate therapy can be successfully treated with implant surgery, when minimum values of [-terminal cross-linked telopeptide type I collagen (CTX) are \nSelect and explain. \nA. 150 pg/ml, B. 100 pg/ml, C. 80 pg/ml, D. 50 pg/ml', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]