This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conjuctiva, Subject name: Ophthalmology
[{'content': 'Diagnosis of the given condition is: \nSelect and explain. \nA. Episcleritis, B. Bitot spots, C. Pterygium, D. Pinguecula', 'role': 'user'}, {'content': "Answer: C \nExplanation: ANS. CGiven image is that of pterygium.# Pinguecula Bitot's spots episceritis* Pinguecula: Degenerative condition of conjunctiva characterized by triangular yellowish white patch on the bulbar conjunctiva near limbus.* Pterygium: Growth of conjunctiva--wing-shaped fold of conjunctiva encroaching onto cornea, Stockers line.", 'role': 'assistant'}]