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
S shaped eyelid is seen in 
Select and explain. 
A. Arterio venous fistula, B. Ulcerative blepharitis, C. Plexiform neurofibroma, D. Horner's syndrome
C: Plexiform neurofibroma
Answer: C: Plexiform neurofibroma 
Explanation: Plexiform neurofibromas - Bag of worm consistency and S shaped eyelid deformity.