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
Which of the following is true about pterygium? 
Select and explain. 
A. Probe can be passed underneath the pterygium at the limbus, B. Associated with exposure to infrared radiation, C. Bare sclera technique has 30-80% recurrence, D. Elastotic degeneration with distoion of Descemet's membrane
C: Bare sclera technique has 30-80% recurrence
Answer: C: Bare sclera technique has 30-80% recurrence 
Explanation: Limbal conjunctival autograft transplantation (LLAT) to cover the defect after pterygium excision is the latest and most effective technique in the management of pterygium. In bare sclera technique, some pa of conjunctiva is excised and its edges are sutured to the underlying episcleral tissue leaving some bare pa of sclera near the limbus ref: A K KHURANA OPHTALMOLOGY,E4, Page-82