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
Term delivery implies that the gestational age of the foetus calculated from the time of onset of last menstrual period is : 
Select and explain. 
A. 40 weeks, B. 42 weeks, C. 38 weeks, D. 260 days
A: 40 weeks
Answer: A: 40 weeks 
Explanation: 40 weeks