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
Which one of the following is primarily bacteriostatic ? 
Select and explain. 
A. Ciprofloxacin, B. Chloramphenicol, C. Vancomycin, D. Rifampicin
B: Chloramphenicol
Answer: B: Chloramphenicol 
Explanation: None