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': 'The specific topical remedy suggested for angular cojunctivitis is \nSelect and explain. \nA. Dexamethasone, B. Sulphacetamide, C. Zinc sulphate, D. Penicillin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Zinc sulphate', 'role': 'assistant'}]