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': 'Blastocyte comes out on which day after feilization ? \nSelect and explain. \nA. 4-7 days, B. 10-12 days, C. 12-15 days, D. 15-20 days', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 4-7 days Free floating unimplanted blastocyst is seen on 4-5 days.", 'role': 'assistant'}]