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': 'Which of the following closely mimics testicular malignancy - \nSelect and explain. \nA. Hydrocele, B. Haematocele, C. Spermatocele, D. Cyst of epididymis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]