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
[{'content': 'In sickle cell anemia replacement is: \nSelect and explain. \nA. Valbglu in b6, B. Glu by val in b6, C. Hist val b8, D. 6A', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Glu by val in b6', 'role': 'assistant'}]