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 does not causes megaloblastic anemia? 
Select and explain. 
A. Phenytoin, B. Chloroquine, C. Sulfasalazine, D. Alcohol
B: Chloroquine
Answer: B: Chloroquine 
Explanation: Ans. is 'b' i.e., Chloroquine