This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pediatrics
[{'content': 'Gonads to testes differentiation \nSelect and explain. \nA. SRY gene, B. WNT-4 gene, C. DAXI gene, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: SRY sex determining region on the Y chromosome . Reference: OP Ghai,essential paediatrics ,8 th edition,page no 537,fig 17.20', 'role': 'assistant'}]