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': "Enophthalmos is caused weakness by: \nSelect and explain. \nA. LPS palsy, B. Tarsal plate, C. Tenon's capsule instability, D. Orbitalis palsy", 'role': 'user'}, {'content': "Answer: C \nExplanation: C. i.e. Tenon's capsule instability", 'role': 'assistant'}]