This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematinics, Subject name: Pharmacology
A patient has subclinical folate deficiency. All of the following drugs can precipitate megaloblastic anemia in this patient except: 
Select and explain. 
A. Alcohol, B. Phenytoin, C. Chloroquine, D. Sulfasalzine
C: Chloroquine
Answer: C: Chloroquine 
Explanation: Ans. (C) Chloroquine(Ref: Harrison 17/e p649)Megaloblastic anemia can be caused by deficiency of folic acid or vitamin B12 . The drugs that can result in deficiency of folic acid include alcohol, phenytoin and sulfonamides