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': 'Which of the following is not a pre-requisits for transvaginal sonography (TVS)? \nSelect and explain. \nA. Consent, B. Fullbladder, C. Empty bladder, D. Lithotomyposition', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Full bladderTransvaginalsonographyisbest performedwith an emptybladder, which enables the pelvic organs to reach acloser proximity to the tip of the high-frequency transvaginal probe.On the other hand trans abdominal sonography is done with full bladder to get an overview of anatomy.', 'role': 'assistant'}]