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': 'A fetomaternal transfusion of more than 30 ml has been found in what percentage of women at delivery: \nSelect and explain. \nA. Less than 1%, B. 5%, C. 10%, D. 15%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 10%', 'role': 'assistant'}]