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': 'Dalen fuchs nodule is a pathognomic feature of which of the following condition ? \nSelect and explain. \nA. Sympathetic opthalmitis, B. Sarcoidosis, C. Tuberculosis, D. Retinitis pigmentosa', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Dalen fuchs nodule refers tocollections of epithelial cells lying between Bruch membrane and the retinal pigment epithelium in sympathetic ophthalmitis.', 'role': 'assistant'}]