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': 'Which is an important marker for bone remodelling: \nSelect and explain. \nA. Serum alkaline phosphate., B. Calcium., C. Hydroxyproline., D. Beta2 microglobulin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The important markers for bone turnover include serum alkaline phosphates for bone formation, urinary calcium and hydroxyproline for bone resorption, and serum β2 microglobulin for bone remodeling.', 'role': 'assistant'}]