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': 'In differential diagnosis of lump in right fornix which is not true : \nSelect and explain. \nA. Ovarian cyst, B. Hydro salpinx, C. Appendicular mass, D. Submucosal fibroid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Submucosal fibroid', 'role': 'assistant'}]