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': 'The enzyme not present in the skeletal muscles \nSelect and explain. \nA. Creatinine phosphokinase, B. Hexokinae, C. Phosphofructokinase, D. Glucose 6 phosphatase', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Glucose 6 phosphatase', 'role': 'assistant'}]