This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fracture Management, Subject name: Orthopaedics
[{'content': 'Which among the following is indicative of bone resorption? \nSelect and explain. \nA. Osteocalcin, B. Urine hydroxyproline, C. Bone specific alkaline phosphatase, D. Type 1 procollagen', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Markers of bone formation: Markers of bone resorption: Serum bone specific alkaline phosphatase --Serum osteocalcin Serum carboxy terminal extension peptide of pro-collagen-1 Serum type I collagen extension peptide Urine and serum cross-linked N telopeptides Urine and serum cross-linked C telopeptides Urine hydroxyproline Urine deoxypyridinoline Urine hydroxylysine glycosides Serum TRAP (Taarate resistant acid phosphatase) --Serum bone sialoprotein', 'role': 'assistant'}]