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: Anatomy
[{'content': 'Diffentiation of genital ridge takes place at ? \nSelect and explain. \nA. 2 months, B. 3 months, C. 4 months, D. 5 months', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 2 months", 'role': 'assistant'}]