This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Strabismus, Subject name: Ophthalmology
Which one of the following extraocular muscles is served by a contra lateral brainstem subnucleus? 
Select and explain. 
A. Superior rectus, B. Medial rectus, C. Inferior oblique, D. Inferior rectus
A: Superior rectus
Answer: A: Superior rectus 
Explanation: Ans. (a) Superior rectusRef: Parson's, 22/e, p. 408Innervation of superior rectus is contralateral, rest all recti have ipsilateral innervation.