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
[{'content': 'Fibroma belongs to ? \nSelect and explain. \nA. Germ cell tumor, B. Sex cord stromal tumor, C. Surface epithelial stromal tumors, D. Metastatic tumors from non ovarian primary', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Sex cord stromal tumor", 'role': 'assistant'}]