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': 'In the incidence of primary angle closure glaucoma, male to female ratio is: \nSelect and explain. \nA. 1:01, B. 1:02, C. 1:03, D. 1:04', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. 1:4', 'role': 'assistant'}]