This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Orbit, Subject name: Ophthalmology
[{'content': 'Axial proptosis is associated with \nSelect and explain. \nA. Optic glioma, B. Dermoid cyst, C. Lacrimal gland tumors, D. Maxillary tumors', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Optic gliomaRef Kanski 7/e, chapter 3, Jakabisc 3/e, p. 2886* Space-occupying lesions within the muscle cone, such as cavernous haemangiomas and optic nerve tumours cause axial proptosis.', 'role': 'assistant'}]