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': 'Fetal marker of growth restriction in USG is \nSelect and explain. \nA. AC, B. AFI, C. FL, D. BPD', 'role': 'user'}, {'content': 'Answer: A \nExplanation: One of the most frequent perinatal complications in high‐risk pregnancy is fetal growth retardation. \nThe aim of the study was the development of instrumental and laboratory criteria for the development of placental\ninsufficiency and IUGR on a preconception stage and in the early stages of gestation.', 'role': 'assistant'}]