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': 'A 50 year old male presents with cicatricial entopion of uper and lower eyelid. On eversion of upper eyelid, linear conjunctival scars - Arlt line are seen. What is the diagnosis? \nSelect and explain. \nA. Trachoma, B. Sprisng catarrah, C. Ligneous conjunctivitis, D. Parinaud oculoglandular syndrome', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Arlt line is a feature of trachoma. Ref: Kanski 8th/e Chap.5, p.138', 'role': 'assistant'}]