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': '58 years old male presenting with acute onset of varicocle on left side most prbobable cause - \nSelect and explain. \nA. Ca testes, B. Epididymitis, C. Inguinal lymphnodes, D. Ca kidney', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]