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': 'Period of embryo is? \nSelect and explain. \nA. 4 to 16 weeks, B. Fertilization to 2 weeks, C. 2 to 8 weeks, D. 8 weeks to birth', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]