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
Muscle in the lid attached to posterior tarsal margin is: 
Select and explain. 
A. Levator palpebrae superioris, B. Superior oblique, C. Muller's muscle, D. Superior rectus
C: Muller's muscle
Answer: C: Muller's muscle 
Explanation: Ans. Muller's muscle