This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
WHICH OF TH EFOLLOWING DRUGS ACT BY INHIBITING DNS REPLICATION ? 
Select and explain. 
A. 6-MERCAPTOPURINE, B. ACTINOMYCIN D, C. ASPARAGINASE, D. MITOMYCIN C
A: 6-MERCAPTOPURINE
Answer: A: 6-MERCAPTOPURINE 
Explanation: REF : KD TRIPATHI 8TH ED