This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Which of the following nerve does not carry parasympathetic fibres: 
Select and explain. 
A. Facial, B. Trochlear, C. Occulomotor, D. Glossopharyngeal
B: Trochlear
Answer: B: Trochlear 
Explanation: The cranial nerves which are a part of parasympathetic system - 3,7,9,10.