This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy and physiology of bone and fracture healing, Subject name: Orthopaedics
Rate of newly synthesized osteoid mineralization can be best estimated by 
Select and explain. 
A. Tetracycline labeling, B. Alizarin red stain, C. Calcein stain, D. Van kossa stain
A: Tetracycline labeling
Answer: A: Tetracycline labeling 
Explanation: Rate of mineralisation is determined by Labelled Tetracycline. ref:maheswari,5th edition page no.12