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': 'Retention of Urine is most likely to be caused by: \nSelect and explain. \nA. Subserous fibromyoma, B. Interstitial fibromyoma, C. Submucous fibromyoma, D. Posterior cervical fibromyoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Posterior cervical fibromyoma', 'role': 'assistant'}]