This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fertilization and Development of Embryo, Subject name: Anatomy
[{'content': 'Embryonic perod is from? \nSelect and explain. \nA. 3 days to 1 week, B. 1 week to 3 weeks, C. 3 weeks to 8 weeks, D. 8 weeks onwards', 'role': 'user'}, {'content': "Answer: C \nExplanation: ANSWER: (C) 3 weeks to 8 weeksREF: Dutta 6th ed p. 24, Langman's Embryology 10th ed Ch: 6Repeat OBG 2012 session I, 2012 Session 2Embryo stage begins at 3rd week and lasts till 8th weekThe fetal stage begins 8 to 10 weeks after conception and continues until the end of the pregnancy", 'role': 'assistant'}]