This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: A.N.S., Subject name: Pharmacology
Which of the following cranial nerves does not carry parasympathetic outflow? 
Select and explain. 
A. Oculomotor, B. Trochlear, C. Facial, D. Glossopharyngeal
B: Trochlear
Answer: B: Trochlear 
Explanation: Ans. (B) Trochlear(Ref: Katzung 11/e p78; KDT 8th/e p105)Parasympathetic cranial nerves are III (oculomotor), VII (facial), IX (glossopharyngeal) and X (vagus).