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
What are the chances of a normally fertile couple having a baby in one month? 
Select and explain. 
A. 80%, B. 25%, C. 605, D. 45%
B: 25%
Answer: B: 25% 
Explanation: Somewhere around 25% of couples will be pregnant at the end of the first month of trying.
About 50% will have conceived in 6 months. Between 85 and 90% of couples will have conceived at the end of a year.
Of those that have not conceived, some still will, without any specific help