This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Placenta - Types and their complications, Subject name: Gynaecology & Obstetrics
[{'content': 'At what size PLACENTOMEGALY is diagnosed on USG? \nSelect and explain. \nA. 25 mm, B. 30 mm, C. 35 mm, D. 40 mm', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Placentomegaly - 40 mm Normal placenta Placentomegaly Size - 22 cm in diameter Thickness - 2.0 to 2.5 cm Weight - 470 g. Thickness > 40 mm . Weight - >750 g. Placentomegaly is associated with: Fetal hydrops Maternal diabetes Chronic infections (e.g. syphilis, cytomegalovirus), Maternal anemia', 'role': 'assistant'}]