This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'Khodadaust Line indicates \nSelect and explain. \nA. Sypathetic ophthalmia that has poor prognosis, B. Rejection of corneal graft, C. Poor prognosis of Acute congestive glaucoma, D. Lesion at optic chiasma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Rejection of corneal graftA Khodadoust Line or chronic focal transplant reaction is a medical sign that indicates a complication of corneal graft surgery on the eye.This method is called Khodadoust Line.', 'role': 'assistant'}]