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
Dilator papillae is supplied by: 
Select and explain. 
A. Occulomotor (III) cranial nerve, B. Sympathetic fibres from the V cranial nerve, C. Postganglionic parasympathetic fibers from Edinger Westphal nucleus, D. Postganglionic sympathetic fibers from cervical ganglion
B: Sympathetic fibres from the V cranial nerve
Answer: B: Sympathetic fibres from the V cranial nerve 
Explanation: B i.e. Post ganglionic sympathetic fibers from cervical ganglion