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: Biochemistry
2, 3 bisphosphoglycerate occurs in ? 
Select and explain. 
A. Liver, B. RBCs, C. Kidney, D. Brain
B: RBCs
Answer: B: RBCs 
Explanation: Ans. is 'b' i.e., RBCs