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: Pharmacology
True statement about tetracycline is 
Select and explain. 
A. Inhibiting protein synthesis by binding to 50s ribosomes in susceptible microorganisms, B. Tetracyclines have chelating property, C. Tetracyclines have anabolic activity, D. Tetracyclines are infrequently responsible for superinfection
B: Tetracyclines have chelating property
Answer: B: Tetracyclines have chelating property 
Explanation: None