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': 'A 24 year old woman presents with new onset right lower quadrant pain, and you palpate an enlarged, tender right adnexa. Which of the following sonographic characteristics of the cyst in this patient suggests the need for surgical exploration now instead to observation for one menstrual cycl? \nSelect and explain. \nA. Lack of ascites, B. Unilocularity, C. Papillary vegetation, D. Diameter of 8 cm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]