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: 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: Ans. is 'b' i.e., Alkaline phosphatase Placental alkaline plosphatase is marker of seminoma. But specificity is very low.", 'role': 'assistant'}]