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
Arlt's line is seen in- 
Select and explain. 
A. Vernal keratoconjunctivitis, B. Pterygium, C. Ocular pemphigoid, D. Trachoma
D: Trachoma
Answer: D: Trachoma 
Explanation: 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