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
[{'content': 'Which is not true regarding zona pellucida \nSelect and explain. \nA. It surrounds morula, B. It is acellular, C. Acetylcholine is the barrier, D. It surrounds the ovum', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C. i.e. Acetylcholine is a barrier', 'role': 'assistant'}]