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: Gynaecology & Obstetrics
[{'content': "Features of Gartner's cyst are all except \nSelect and explain. \nA. Well defined margins, B. Cough impulse present, C. Not reducible, D. Rugosities of vaginal mucosa lost", 'role': 'user'}, {'content': "Answer: B \nExplanation: Cough impulse is absent in gartner's cyst.", 'role': 'assistant'}]