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
The most common site of enlargement of the lymph nodes in Hodgkin's lymphoma is - 
Select and explain. 
A. Mediastinal, B. Axillary, C. Cervical, D. Abdominal
A: Mediastinal
Answer: A: Mediastinal 
Explanation: Schwartz writes - "In about 50% of patients who have both Hodgkin's and non-Hodgkin's lymphoma, the mediastinum may be the primary site."