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
Rate of newly synthesized osteoid minerlisation can be best estimated by: 
Select and explain. 
A. Von Kossa Stain, B. Alizarin red stain, C. Reticulin stain, D. Tetracycline labelling
D: Tetracycline labelling
Answer: D: Tetracycline labelling 
Explanation: Best method to detect osteoid mineralisation is tetracycline labelling.