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
The following condition is not associated with an increased anion-gap type of metabolic acidosis - 
Select and explain. 
A. Shock, B. Ingestion of ante-freeze, C. Diabetic keto-acidosis, D. COPD
D: COPD
Answer: D: COPD 
Explanation: COPD does not produce metabolic acidosis, it causes respiratory acidosis, so there is no question of anion gap acidosis.