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
Failure rate is after tuba! sterilization with pomeroys technique 
Select and explain. 
A. Zero, B. 0.10%, C. 0.40%, D. 1.00%
C: 0.40%
Answer: C: 0.40% 
Explanation: 0.40%