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: Medicine
Megaloblastic anemia may be caused by all of the following except - 
Select and explain. 
A. Phenytoin, B. Methotrexate, C. Pyrimethamine, D. Amoxycilline
D: Amoxycilline
Answer: D: Amoxycilline 
Explanation: None