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 causing megaloblastic anemia is : 
Select and explain. 
A. INH, B. Chloramphenicol, C. Pyrimethamine, D. Methyldopa
C: Pyrimethamine
Answer: C: Pyrimethamine 
Explanation: None