This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular motility and squint, Subject name: Ophthalmology
[{'content': 'Yolk muscle pair is \nSelect and explain. \nA. Right medial rectus & Right lateral rectus, B. Right medial rectus & Left lateral rectus, C. Right superior oblique & Left inferior oblque, D. Right superior rectus & Left superior rectus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Yoke muscles (contralateral synergists)refers to the pair of muscles (one from each eye) which contract simultaneously during version movements. For example, right lateral rectus and left medial rectus act as yoke muscles for dextroversion movements. Other pairs of yoke muscles are: right MR and left LR, right LR and left MR, right SR and left IO, right and left SO, right SO and left IR, and right IO and Left SRRefer: AK Khurana Comprehensive Ophthalmology, 6th edition, pg no. 339', 'role': 'assistant'}]