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': 'If a person has visual acuity 6/6. At what distance will he/she be able to read 6/24 lines \nSelect and explain. \nA. 6 metres, B. 24 metres, C. 36 metres, D. 48 metres', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. 24 metresVisual acuity 616 means that a Person with normal visual acutiy can read the smallest line at a distance of 6 meters.Visual acdty 6124 means that this person can read paicular letters/lines at a distance of 6 meters which a person with normal visual acuity can read from a distance of 24 mm.', 'role': 'assistant'}]