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': 'Fascicular ulcer is seen in: \nSelect and explain. \nA. Phlyctenular keratitis, B. Rosacea keratitis, C. Riboflavin deficiency, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Phlyctenular keratitis', 'role': 'assistant'}]