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': 'Rate of newly synthesized osteoid minerlisation can be best estimated by: \nSelect and explain. \nA. Von Kossa Stain, B. Alizarin red stain, C. Reticulin stain, D. Tetracycline labelling', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Best method to detect osteoid mineralisation is tetracycline labelling.', 'role': 'assistant'}]