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': 'Corneal ulcer is defined as \nSelect and explain. \nA. Erosion of epithelium only, B. Erosion of endothelium only, C. Erosion of epithelium + underlying inflammation, D. Loss of endothelium with loss of corneal sensation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer- C. Erosion of epithelium + underlying inflammationCorneal ulcer refers to discontinuation in normal epithelial surface of cornea associated with necrosis of the surrounding corneal tissue', 'role': 'assistant'}]