The nucleus ambiguus is shared by all of the following cranial nerves except: (A) IX, (B) X, (C) XI, (D) XII
Answer is D. Cranial pa of nucleus ambiguus gives fibers to IX, X and the cranial root of XI nerve. The caudal pa of this nucleus gives fibers to the spinal root of XI nerveRef: Chaurasia; Volume 3; 6th edition; Page no: 342