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: Anatomy
[{'content': 'During the third week of human embryo development- \nSelect and explain. \nA. Neural plate formed by stimulation from notochord, B. Amniotic disc forms, C. Body stalk moves ventrally to form umbilical cord, D. Primitive streak formation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]