This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular Embryology& Anatomy, Subject name: Ophthalmology
[{'content': 'What is the volume of each orbit? \nSelect and explain. \nA. 40ml, B. 30ml, C. 50ml, D. 35ml', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Vol of each orbit= 30ml Vol of each eyeball=6ml Globe suspended by 7 attachments( 6 muscles and 1 nerve) Angle b/w lateral walls=90o Angle b/w lateral and medial walls=45o', 'role': 'assistant'}]