This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
[{'content': 'Rate limiting enzyme in glycolysis? \nSelect and explain. \nA. Glucokinase, B. Phosphofructokinase-1, C. Phosphoglycerate kinase, D. Enolase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]