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': 'Psammoma bodies are seen in all except: \nSelect and explain. \nA. Follicular Ca thyroid, B. Papillary Ca thyroid, C. Serous cystadenoma of ovary, D. Meningioma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Follicular Ca thyroid', 'role': 'assistant'}]