This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conjunctiva, Subject name: Ophthalmology
Pterygium is 
Select and explain. 
A. An inflammatory response, B. A connective tissue disorder, C. An infection, D. Assosciated with vitamin A deficiency
A: An inflammatory response
Answer: A: An inflammatory response 
Explanation: Pterygium is subconjuctival fibrobasvular growth encroaching on the cornea REF:Refer Khurana 6th edition page number 87