This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Regarding sexual differentiation of the fetus \nSelect and explain. \nA. Gonadal development begins at 5th week of intrauterine life, B. Y chromosome determines the differentiation of ovaries, C. Female external genitalia development is completed by 10 weeks, D. Male sexual differentiation occurs earlier than females', 'role': 'user'}, {'content': 'Answer: A \nExplanation: OptionB: SRY Gene located on Y chromosome encodes Testis Determining Factor which leads to the development of male genital organs Option C&D: Development of external genitalia is similar in males and females till the 6th week of IUL(Indifferent stage)....later develops in the direction of hormones. REFERENCE: TEXTBOOK OF CLINICAL EMBRYOLOGY... VISHRAM SINGH SECOND EDITION..PAGE NO:277', 'role': 'assistant'}]