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
In the absence of feilization and implantation the corpus luteum persists for : 
Select and explain. 
A. 2 - 3 days, B. 6 - 8 days, C. 12 - 14 days, D. 28 - 30 days
C: 12 - 14 days
Answer: C: 12 - 14 days 
Explanation: 12 - 14 days