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: Radiology
[{'content': 'Maximum radio opaque shadow in ovary is seen in \nSelect and explain. \nA. Teratoma, B. Dysgerminoma, C. Mucinous cystadenoma, D. Granulosa cell tumor', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Teratoma In teratoma, there may be presence of tooth & other calcified bodies giving rise to radio-opaque shadows.', 'role': 'assistant'}]