This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Ophthalmology
[{'content': 'Pterygium all are true except \nSelect and explain. \nA. Arise from any pa of conjunctiva, B. Can cause astigmatism, C. Surgery is treatment of choice, D. UV exposure is risk factor', 'role': 'user'}, {'content': 'Answer: A \nExplanation: . Arise from any pa of conjunctiva Ref: AK khurana 7th ed.', 'role': 'assistant'}]