This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
[{'content': "All are corneal signs of Trachoma except \nSelect and explain. \nA. Hebe follicles, B. Pannus, C. Opacity, D. Arlt's line", 'role': 'user'}, {'content': "Answer: D \nExplanation: (Refer: AK Khurana Comprehensive Ophthalmology, 6th edition, pg no. 67 - 71) Arlt's line is a conjunctival sign (not corneal)Signs of TrachomaConjunctival signs:- Congestion, conjunctival follicles (boiled sagograin like), Papillary hyperplasia, conjunctival scarring (Arlt's line), ConcretionCorneal signs:- superficial keratitis, Herbe follicles, pannus, Corneal ulcer, Herbe pits, corneal opacity Arlt's line is a thick band of scar tissue in the conjunctiva of the eye, near the lid margin, that is associated with eye infections. Arlt's line is a characteristic finding of trachoma, an infection of the eye caused by Chlamydia trachomatis.", 'role': 'assistant'}]