This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'All of the following are ultrasonographic fetal growth parameters except \nSelect and explain. \nA. Head circumference, B. Transcerebellar diameter, C. Femur length, D. Biparietal diameter', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ultrasound imaging: Standard morphometric measurements are as under Fetal crown-rump length (in the first trimester); Biparietal diameter; Head circumference; Abdominal circumference; Femur length; and Total intrauterine volume.', 'role': 'assistant'}]