This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
[{'content': 'A 36-year-old lady presents with a 20 yrs duration fluctuant and translucent swelling on right side of her neck. No other history available. No other findings on examination of neck. What is the most probable diagnosis? \nSelect and explain. \nA. Lymph cyst, B. Lymph node, C. Colloid nodule, D. Cold abscess', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The only swelling among the 4 options which will show translucency is Lymph cyst.', 'role': 'assistant'}]