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': 'Rate of mineralization of newly formed osteoid can be estimated by the following: \nSelect and explain. \nA. Von Kossa staining for calcium, B. Alzarin red stain, C. Labelled tetracycline, D. Immunofluorescence', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tetracycline -becomes fixed in new forming mineralizing bone, exhibits a characteristic fluorescence when viewed by UV light 2 doses of tetracycline given a few of days apa, 2 bands of fluorescence- separated by an interval of unlabelled new bone formed during the period between doses. Rate of mineralization of newly formed osteoid is estimated by tetracycline labelling', 'role': 'assistant'}]