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': "Diagnosis of Hodgkin's disease is confirmed by \nSelect and explain. \nA. CT scan, B. Bone marrow biopsy, C. Lymph node biopsy, D. Lymphangiography", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref : Bailey & Love 25/e p945', 'role': 'assistant'}]