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
Germ cells in the ovary develop from- 
Select and explain. 
A. Coelomic endoderm, B. Trophoblastic layer, C. Yolk sac, D. Surface ectoderm
C: Yolk sac
Answer: C: Yolk sac 
Explanation: None