This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological diagnosis and operative surgery, Subject name: Gynaecology & Obstetrics
[{'content': 'Goniometer is used for: \nSelect and explain. \nA. Amount o vaginal secretions, B. To measure width of genital hiatus, C. Gonococcal colony count, D. Urethrovesical angle', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Goniometer: It is an instrument used to measure an angle Utherovescial angle is measured in Gynecology using this instrument Ref: Internet sources.', 'role': 'assistant'}]