This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Anatomy
[{'content': 'Pseudo rosettes are seen in all except \nSelect and explain. \nA. Neuroblastoma, B. Retinoblastoma, C. Medulloblastoma, D. Thecoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Thecomas or theca cell tumors are benign ovarian neoplasms composed only of theca cells. Histogenetically they are classified as sex cord-stromal tumours. They are typically estrogen-producing and they occur in older women (mean age 59; 84% after menopause). Refer Robbins page no 1051', 'role': 'assistant'}]