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': "Most common allergic manifestation of tuberculosis is : \nSelect and explain. \nA. Phlyctenular conjunctivitis, B. Koeppe's nodule, C. Retinopathy, D. Scleritis", 'role': 'user'}, {'content': "Answer: B \nExplanation: B i.e. Koeppe's nodule", 'role': 'assistant'}]