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': 'Normal IOP is range is ____________ \nSelect and explain. \nA. 10 - 15 mmHg, B. 5 - 10 mmHg, C. 11 - 21 mmHg, D. 9 - 25 mmHg', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]