This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Radiology
[{'content': "Prophylactic intracranial irradiations is indicated in all the following, EXCEPT: \nSelect and explain. \nA. Small cell Carcinoma of lung, B. Acute Leukemic Leukemia, C. Hodgkin's Lymphoma, D. Non-Hodgkin's lymphoma", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. C. Hodgkin's LymphomaLung cancer, breast cancer, leukemias, NHL, gastrointestinal malignancies and melanoma are common tumors that metastasize to brain. By contrast, prostate and ovarian cancer and Hodgkin's disease (HD) rarely metastasize to brain.Radiation is the primary treatment for brain metastases. Thus, prophylactic craniospinal irradiation is useful in lung cancer, ALL and NHL but not in HO.", 'role': 'assistant'}]