This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuro Ophthalmology, Subject name: Ophthalmology
[{'content': 'Not a true statement regarding 3rd cranial nerve: \nSelect and explain. \nA. Palsy may lead to ptosis, B. Nucleus in lower mid brain, C. Uncontrolled BP is a common cause, D. Supplies medial rectus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Nucleus of 3rd cranial nerve at the level of superior colliculus in the mid-brain. 3rd nerve supplies all the muscles of eye except lateral rectus( LR6) & superior oblique(SO4) 3rd CN palsy: -Pupil is down & out -Ptosis (as LPS also paralysed) -Common causes- uncontrolled BP/HTN', 'role': 'assistant'}]