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 chronic staphylo-coccal blepharoconjunctivitis except: 
Select and explain. 
A. Chalazion, B. Marginal conjunctivitis, C. Follicular conjunctivitis, D. Phylectenular conjunctivitis
A: Chalazion
Answer: A: Chalazion 
Explanation: Ans. Chalazion