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': 'Thinnest wall of orbital cavity is \nSelect and explain. \nA. Medial wall, B. Lateral wall, C. Inferior wall, D. Superior wall', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Thinnest wall of orbital cavity is Medial wall.', 'role': 'assistant'}]