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: Pathology
[{'content': 'Psammoma bodies are seen in following except- \nSelect and explain. \nA. Serous cystadenoma of ovary, B. Mucinous cystadenoma of ovary, C. Meningioma, D. Papillary carcinoma of thyroid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Psammoma bodies are concentrically arranged calcified structures,seen in papillary carcinoma of thyroid ,serous cystadenoma of ovary and meningioma. It is not a feature of mucinous cystadenoma of ovary. (Ref:ROBBINS Textbook of pathology)', 'role': 'assistant'}]