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
[{'content': 'Marker of bone formation are all except - \nSelect and explain. \nA. Osteocalcin, B. Alkaline phosphatase, C. Procollagen residue, D. Hydroxyproline', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hydroxyproline is a marker of bone resorption ( not bone formation).', 'role': 'assistant'}]