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
[{'content': 'The following condition is not associated with an increased anion-gap type of metabolic acidosis - \nSelect and explain. \nA. Shock, B. Ingestion of ante-freeze, C. Diabetic keto-acidosis, D. COPD', 'role': 'user'}, {'content': 'Answer: D \nExplanation: COPD does not produce metabolic acidosis, it causes respiratory acidosis, so there is no question of anion gap acidosis.', 'role': 'assistant'}]