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
Enophthalmos is caused weakness by: 
Select and explain. 
A. LPS palsy, B. Tarsal plate, C. Tenon's capsule instability, D. Orbitalis palsy
C: Tenon's capsule instability
Answer: C: Tenon's capsule instability 
Explanation: C. i.e. Tenon's capsule instability