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
Drug that inhibits cell wall synthesis is ? 
Select and explain. 
A. Tetracyclines, B. Penicillins, C. Aminoglycosides, D. Chloramphenicol
B: Penicillins
Answer: B: Penicillins 
Explanation: None