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': 'In anemia the conc. Of 2,3 DPG is \nSelect and explain. \nA. Decreased, B. Increased, C. A or B, D. Not changed', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]