This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
Which of the following carnial nerves does not carry parasympathetic outflow 
Select and explain. 
A. Oculomotor, B. trochlear, C. Facial, D. Glossopharyngeal
B: trochlear
Answer: B: trochlear 
Explanation: Parasympathetic carnial nerves are III(oculomotor),VII(facial),IX(glossopharyngeal) and X(vagus).