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: Ophthalmology
[{'content': 'Lamina Cribrosa is absent in \nSelect and explain. \nA. Macular hole, B. Coloboma of Optic disc, C. Optic atrophy, D. Morning glory syndrome', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Morning glory syndrome is a birth defect of optic nerve that resembles flower known as morning glory.', 'role': 'assistant'}]