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': 'Rosettes are characteristic in: \nSelect and explain. \nA. Retinoblastoma, B. Lymphoma, C. Melanoma, D. Dysgerminoma', 'role': 'user'}, {'content': "Answer: A \nExplanation: Rosettes are characteristic in retinoblastomas. Ref: Robbin's Illustrated Pathology, 7th Edition, Pages 1442, 43; Textbook of Medical Physiology By Khurana, 4th Edition, Page 281", 'role': 'assistant'}]