This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of orbit, Lids and lacrimal apparatus, Subject name: Ophthalmology
[{'content': 'Most common couse of trichiasis is- \nSelect and explain. \nA. Stye, B. Trachoma, C. Blephritis, D. Congenital', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Other causes are ulcerative blepharitis, healed membranous conjuctivitis ,stye , burns. Ref : Ak khurana 6th edition Ref img', 'role': 'assistant'}]