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': 'Keratomalacia is associated with: \nSelect and explain. \nA. Measles, B. Mumps, C. Rubella, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Measles Measles and diarrhoea can cause vit A deficiency and thus lead to keratomalacia Q', 'role': 'assistant'}]