This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sex Hormones, Subject name: Physiology
[{'content': 'Fertilization is complete when - \nSelect and explain. \nA. 1st Polar body is formed, B. 2nd Polar body is formed, C. Primary oocyte is formed, D. Secondary oocyte is formed', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., 2nd Polar body is formed "As soon as a spermatozoon enters the ovum, the lather finishes its second meiotic division and the second polar body is formed" - I.B. Singh', 'role': 'assistant'}]