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
Macrocytic anaemia is noted with all of the following except : 
Select and explain. 
A. Phenytoin, B. Methotrexate, C. Pyrimethamine, D. Ciprofloxacin
D: Ciprofloxacin
Answer: D: Ciprofloxacin 
Explanation: None