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
Aplastic anemia is the adverse effect of : 
Select and explain. 
A. Chloramphenicol, B. Ciprofloxacin, C. Penicillin, D. Gentamicin
A: Chloramphenicol
Answer: A: Chloramphenicol 
Explanation: None