This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pharmacology
Megaloblastic anemia may be caused by all of the following except 
Select and explain. 
A. Dilantin toxicity, B. Vitamin B12 deficiency, C. Folic acid deficiency, D. Long term aspirin intake
D: Long term aspirin intake
Answer: D: Long term aspirin intake 
Explanation: Dilantin is phneytion. It reults in folic acid deficiency that can result in Megaloblastic anemia