This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Obstetrical Anatomy, Subject name: Gynaecology & Obstetrics
Ovaries develop from which of the following? 
Select and explain. 
A. Genital ridge, B. Mullerian duct, C. Endoderm of urogenital sinus, D. Genital tubercle
A: Genital ridge
Answer: A: Genital ridge 
Explanation: Ans. A. Genital ridge.The ovary is developed from the cortex of the undifferentiated genital ridges by about 9th week the primary germ cells reaching the site migrating from the dorsal end of yolk sac.