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': 'Which compound shifts the Oxygen dissociation curve to the right: \nSelect and explain. \nA. 1, Phosphoglycerate, B. 2, 3 DPG, C. 1, 3 DPG, D. Glyceraldehyde', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. 2,3, DPG', 'role': 'assistant'}]