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
Psammoma bodies are seen in the following except ? 
Select and explain. 
A. Serous cystadenoma of ovary, B. Mucinous cysadenoma of ovary, C. Meningioma, D. Papillary carcinoma of thyroid
B: Mucinous cysadenoma of ovary
Answer: B: Mucinous cysadenoma of ovary 
Explanation: Ans. is 'b' i.e., Mucinous cysadenoma of ovary