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': 'All of ;tie ruilowilig are ultrasoliographic fetal growth parameters except : \nSelect and explain. \nA. Biparietal diameter, B. Head circumference, C. Transcerebeller diameter, D. Femur length', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is c i.e. Transcerebellar diameter', 'role': 'assistant'}]