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': 'What are the chances of a normally fertile couple having a baby in one month? \nSelect and explain. \nA. 80%, B. 25%, C. 605, D. 45%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Somewhere around 25% of couples will be pregnant at the end of the first month of trying.\nAbout 50% will have conceived in 6 months. Between 85 and 90% of couples will have conceived at the end of a year.\nOf those that have not conceived, some still will, without any specific help', 'role': 'assistant'}]