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: Physiology
[{'content': '2-3 DPG is decreased in ? \nSelect and explain. \nA. Anemia, B. Acidosis, C. High altitude, D. Exercise', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., AcidosisFactors which decrease 2,3 DPG and cause left shift of O2 dissociation curve are :-i) Acidosisii) Stored bloodiii) Fetal hemoglobin", 'role': 'assistant'}]