All of the following statements about the vagus nerve are true EXCEPT: (A) Supplies hea and lung, (B) Carries postganglionic parasympathetic fibers, (C) Innervates right two third of transverse colon, (D) Stimulates peristalsis and relaxes sphincters
Answer is B. 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.