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': 'An elderly male presents with one episode of gross haematuria. All of the following investigations are recommended for this patient except: \nSelect and explain. \nA. Cystoscopy, B. Urine microscopy for malignant cells, C. Urine tumor markers, D. Intravenous Pyelogram', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]