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': 'All of the following abnormalities are predisposing causes for torsion of the testis except - \nSelect and explain. \nA. Inversion of testis, B. Low investment of tunica vaginalis, C. Between 10 to 25 years of age, D. Separation of the epididymis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]