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': 'Sonographic criteria for diagnosing PCOD includes all except \nSelect and explain. \nA. Enlarged ovaries > 10mL, B. Presence of > 20 cysts in ovary, C. Cyst size 2 → 9 mm, D. Cysts in either one or both ovaries', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Presence of 12 or more cysts on ultrasound is diagnostic of PCOD.', 'role': 'assistant'}]