This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cranial Nerves, Subject name: Anatomy
All of the following statements about the vagus nerve are true EXCEPT 
Select and explain. 
A. Supplies hea and lung, B. Carries postganglionic parasympathetic fibers, C. Innervates right two third of transverse colon, D. Stimulates peristalsis and relaxes sphincters
B: Carries postganglionic parasympathetic fibers
Answer: B: Carries postganglionic parasympathetic fibers 
Explanation: Cranial nerve 3, 7, 9 and 10 (vagus) carry the preganglionic (and not post-ganglionic) parasympathetic fibers. It supplies the parasympathetic fibers to lungs and hea, and the GI system till the mid-gut. The right 2/3 of the transverse colon belongs to mid-gut and is supplied by the vagus nerve.