This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'The weakest wall of the human orbit is \nSelect and explain. \nA. Roof, B. Medial wall, C. Floor, D. Lateral wall', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Each orbit resembles a four-sided pyramid on one side. The four walls of the orbit are: roof, floor, lateral and medial walls. The medial wall is very thin. From before backward, it is formed by (a) The frontal process of the maxilla; (b) the lacrimal bone; (c) the orbital plate of the ethmoid; and (d) the body of the sphenoid bone. <img src=" /> Ref: BD Chaurasia\'s HUMAN ANATOMY, Volume 3, 4th edition.', 'role': 'assistant'}]