This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Testis and scrotum, Subject name: Surgery
[{'content': 'Chinese lantern on transillumination seen in: \nSelect and explain. \nA. Spermatocele, B. Epididymal cyst, C. Hydrocele of cord, D. Secondary hydrocele', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Chinese - Lantern pattern on transillumination is more commonly seen in epididymal cyst.', 'role': 'assistant'}]