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': 'Which of the following is ovary determining gene \nSelect and explain. \nA. SRY, B. WNT - 4, C. SOX - 9, D. DAX 1', 'role': 'user'}, {'content': 'Answer: B \nExplanation: WNT - 4 is ovary determining gene.', 'role': 'assistant'}]