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
Which compound shifts the Oxygen dissociation curve to the right: 
Select and explain. 
A. 1, Phosphoglycerate, B. 2, 3 DPG, C. 1, 3 DPG, D. Glyceraldehyde
B: 2, 3 DPG
Answer: B: 2, 3 DPG 
Explanation: B i.e. 2,3, DPG