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: Medicine
[{'content': 'A man presents with mass at duoenojejunal flexor invading renal papilae. Histopathology reports it as lymphoma: true statement is - \nSelect and explain. \nA. II E stage, B. III E stage, C. IV E stage, D. Staging cannot be done until bone marrow examinatiion is performed', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]