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
Which is not true regarding zona pellucida 
Select and explain. 
A. It surrounds morula, B. It is acellular, C. Acetylcholine is the barrier, D. It surrounds the ovum
C: Acetylcholine is the barrier
Answer: C: Acetylcholine is the barrier 
Explanation: C. i.e. Acetylcholine is a barrier