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': "Arlt's line is seen in- \nSelect and explain. \nA. Vernal keratoconjunctivitis, B. Pterygium, C. Ocular pemphigoid, D. Trachoma", 'role': 'user'}, {'content': "Answer: D \nExplanation: Arlt's line is seen in trachoma due to conjuctival scrarring,which may be irregular,star shaped or linear. this linear scar present in the sulcus subtarsalis is called Al's line Ref ; A K KHURANA Comorehensive Ophtalmology edition 4,page-69 ref img", 'role': 'assistant'}]