This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'Which of the following is a tumor marker - \nSelect and explain. \nA. Acid hydrolase, B. Alkaline phosphatase, C. Melatonin, D. CPK-MB', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Alkaline phosphatase is a marker for bone tumors. Basic Pathology, Robbins. Page no.: 770', 'role': 'assistant'}]