This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular Motility, Subject name: Ophthalmology
[{'content': 'Distance of Muscle 5 from Limbus \nSelect and explain. \nA. 4.5 mm, B. 5.5 mm, C. 7,6 mm, D. 10 mm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 5.5 mm (Muscles shown: 1 Superior rectus, 2 Lateral rectus, 3 Inferior rectus, 4 Inferior Oblique, 5 Medial rectus, 6 Superior oblique)', 'role': 'assistant'}]