This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological oncology, Subject name: Gynaecology & Obstetrics
[{'content': 'Call-Exner bodies are seen in \nSelect and explain. \nA. Gynandroblastoma, B. Granulosa cell tumor, C. Seoli-Leydig cell tumor, D. Fibroma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Seen in granulosa cell tumorIn the most common variety, the adult granulosa cells show a tendency to arrange themselves in small clusters or rosettes around a central cavity, so there is a resemblance to primordial follicles (i.e., Call-Exner bodies)."Coffee bean" grooved nuclei are characteristic.Ref: Berek and Novak&;s Gynecology; 15th edition; Chapter 37', 'role': 'assistant'}]