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': 'Normal anionic gap is seen in one of the following - \nSelect and explain. \nA. Diarrhoea, B. Uremia, C. Lactic acidosis, D. Ketosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]