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: Surgery
Diagnosis of Hodgkin's disease is confirmed by ? 
Select and explain. 
A. CT scan, B. Bone marrow biopsy, C. Lymph node biopsy, D. Lymphangiography
C: Lymph node biopsy
Answer: C: Lymph node biopsy 
Explanation: Ans. is 'c' i.e., Lymph node biopsy