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': 'What is the ratio of placental weight to fetal weight at term ? \nSelect and explain. \nA. 1:04, B. 1:05, C. 1:06, D. 1:07', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Placenta weighs 500 gm, the propoion to the weight of the baby being roughly 1:6 at term and occupies about 30% of the uterine wall.', 'role': 'assistant'}]