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
[{'content': 'Renal TB mode of infection \nSelect and explain. \nA. Direct from bowel, B. Ascending, C. Hematogenous, D. Lymphatic', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer- C. HematogenousGenitourinary tuberculosis is always secondary to pulmonary infection, though in many cases, the primary focus has healed or is quiescent.Infection occurs the hematogenous route', 'role': 'assistant'}]