This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conjunctiva, Subject name: Ophthalmology
[{'content': 'Dendritic ulcer is produced by \nSelect and explain. \nA. Pneumococcus, B. Herpes zoster virus, C. Gonococcus, D. Herpes simplex virus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Epithelial Herpes simplex Virus keratitis - Symptoms Redness Pain Photophobia Tearing Decreased vision Signs Three distinct patterns of epithelial keratitis seen are : punctate Epithelial keratitis dendritic ulcer geographical ulcer Ref;A.K.Khurana; 6th edition; Page no:108 REF IMG', 'role': 'assistant'}]