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
Diffentiation of genital ridge takes place at ? 
Select and explain. 
A. 2 months, B. 3 months, C. 4 months, D. 5 months
A: 2 months
Answer: A: 2 months 
Explanation: Ans. is 'a' i.e., 2 months