This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Development period- week 1,2,3,4, Subject name: Anatomy
Contents of perivitelline space are:- 
Select and explain. 
A. Polar bodies, B. Deutoplasm, C. Secondary oocyte, D. None of above
A: Polar bodies
Answer: A: Polar bodies 
Explanation: Cell membrane of secondary oocyte is known as vitelline membrane which is covered by zona pellucida. A perivitelline space appears between vitelline membrane and zona pellucida for the accommodation of polar bodies.