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': 'Zygote reaches the uterine cavity as : \nSelect and explain. \nA. 32 celled, B. 16 celled, C. 8 celled, D. 2 celled', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is b i.e. 16 celled', 'role': 'assistant'}]