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
[{'content': 'Pterygium is – \nSelect and explain. \nA. A vascular anomaly, B. A connective tissue degeneration, C. An inflammatory condition, D. Associated with Vitamin A deficiency', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pterygium is the degenerative condition of conjunctiva and is characterized by elastotic degeneration of subconjunctival tissue.', 'role': 'assistant'}]