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': 'Yolk muscle pair is: \nSelect and explain. \nA. Rt MR and Rt LR, B. Rt MR and Lt LR, C. Rt SO and Lt TO, D. Rt SR and Lt SR', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Rt MR and Lt LR', 'role': 'assistant'}]