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
[{'content': 'The second maturation division of the human ovum occurs at the time of : \nSelect and explain. \nA. Feilisation, B. Implantation, C. Ovulation, D. Pubey', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Feilisation', 'role': 'assistant'}]