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
The superior oblique muscle is supplied by: 
Select and explain. 
A. 3rd cranial nerve, B. 4th cranial nerve, C. 5th cranial nerve, D. 6lh cranial nerve
B: 4th cranial nerve
Answer: B: 4th cranial nerve 
Explanation: B i.e. 4th cranial nerve