This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Phlycten is due to \nSelect and explain. \nA. Exogenous allergy, B. Endogenous allergy, C. viral keratitis, D. Fungal keratitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Endogenous allergens in Phlyctenular conjunctivitis are staphylococcus aureus and tuberculosis Refer Khurana 6th edition page number 83', 'role': 'assistant'}]