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 most serious alkali burns of the eye are produced by: \nSelect and explain. \nA. Strong liquid ammonia, B. Caustic soda, C. Lime, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Strong liquid ammonia', 'role': 'assistant'}]