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: Unknown
[{'content': 'Corona Radiata of ovum is formed from - \nSelect and explain. \nA. Cumulus ovaricus, B. Zona pellucida, C. Formative yolk, D. Follicular cells', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans - D', 'role': 'assistant'}]