This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Feilization is complete when 
Select and explain. 
A. 1st polar body is formed, B. 2nd polar body is formed, C. Primary oocyte is formed, D. Secondary oocyte is formed
B: 2nd polar body is formed
Answer: B: 2nd polar body is formed 
Explanation: At feilization, the secondary oocyte complete meiosis 2 to form a mature oocyte and a second polar body Ref: Gray's 39e/p-210-220