This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Rosettes are characteristically seen in \nSelect and explain. \nA. Retinoblastoma, B. Melanoma, C. Dysgerminoma, D. Lymphoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref Robbins 7/e p1442; neuropathology for the neuroradiologist : rosette and pseudorosettes by F.J.wipopld and A.perry Rosettes consist of a Halo or spoke wheel arrangements of cells surrounding a central core or hub Rosettes may be considered primary or secondary manifestation of tumor architecture . Primary rosettes form as a characteristics growth pattern of a given tumor type, ahereas secondary rosettes result from the influence of external factors on tumors growth', 'role': 'assistant'}]