This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular Trauma, Subject name: Ophthalmology
[{'content': 'Dalen fuchs nodule is pathognomic of? \nSelect and explain. \nA. Sympathetic opthalmitis, B. Sarcoidosis, C. Tuberculosis, D. Retinitis pigmentosa', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) Sympathetic opthalmitisREF: Khurana 4th ed p. 413Dalen fuchs nodule is collections of epithelial cells lying between Bruch membrane and the retinal pigment epithelium in sympathetic ophthalmitis', 'role': 'assistant'}]