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 is not true about the Trochlear nerve: 
Select and explain. 
A. Has the longest intracranial course, B. Supplies the ipsilateral superior oblique muscle, C. Only cranial nerve that arises from the dorsal aspect of the brainstem, D. Enters orbit through the superior orbital fissure outside the annulus of Zinn
B: Supplies the ipsilateral superior oblique muscle
Answer: B: Supplies the ipsilateral superior oblique muscle 
Explanation: B i.e. Supplies the ipsilateral superior oblique muscle