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
[{'content': 'Arlts line is seen in \nSelect and explain. \nA. Vernal keratoconjunctis, B. Pterygium, C. Ocular pemphigoid, D. Trachoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Arlts line is a linear scarring on the upper palpebral conjunctiva in patients of trachoma REF:Refer Khurana 6th edition page number 69', 'role': 'assistant'}]