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
All are complications of ulcerative blepharitis except: 
Select and explain. 
A. Poliosis, B. Madarosis, C. Tylosis, D. Trichiasis
A: Poliosis
Answer: A: Poliosis 
Explanation: Poliosis