This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Sixth cranial nerve lies at? 
Select and explain. 
A. Midbrain, B. Pons, C. Medulla, D. Cerebellum
B: Pons
Answer: B: Pons 
Explanation: Sixth cranial nerve which supplies the lateral rectus muscle of the eyeball. one nerve fibre supplies approximately six muscles fibers. Abducent nucleus is situated in the upper pa of the floor of fouh ventricle in the lower pons, beneath the facial colliculus.ventromedially it is closely related to the medial longitudinal bundle. Ref;BDC volume 3;6th edition.