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
Macrocytic anaemia occurs in all,except - 
Select and explain. 
A. Thiamine deficiency, B. Liver disease, C. Orotic aciduria, D. Copper deficiency
D: Copper deficiency
Answer: D: Copper deficiency 
Explanation: None