This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Maximum amount of alkaline phosphatase is seen in: \nSelect and explain. \nA. Semen, B. Placenta, C. CSF, D. Plasma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: a', 'role': 'assistant'}]