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: Gynaecology & Obstetrics
[{'content': "Which are seen in endodermal sinus tumor \nSelect and explain. \nA. Schiller-duval bodies, B. Reed-Sternberg cells, C. Reinke's crystals, D. Russell bodies", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a i.e. Schiller-duval bodies', 'role': 'assistant'}]