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: Biochemistry
Inhibitors of DNA synthesis - 
Select and explain. 
A. Penicillin, B. Polymyxin, C. Chloramphenicol, D. Actinomycin
D: Actinomycin
Answer: D: Actinomycin 
Explanation: D i.e. Actinomycin