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: Unknown
Special visceral efferent doesn’t involve 
Select and explain. 
A. Nucleus ambiguous, B. Motor nucleus of fifth cranial nerve, C. Dorsal nucleus of tenth cranial nerve, D. Motor nucleus of seventh cranial nerve
C: Dorsal nucleus of tenth cranial nerve
Answer: C: Dorsal nucleus of tenth cranial nerve 
Explanation: Ref. Gray’s anatomy.  41st edition. Page.  982
All of the spinal nerves contain both sensory and motor functions and can be organized on the basis of the functional components of each nerve.

General Somatic Afferent (GSA) fibers are related to receptors for pain temperture and mechanical receptors in the skin, muscles and joints
General Visceral Afferent (GVA) fibers are related to receptors in visceral structures
General Visceral Efferent (GVE) fibers are preganglionic autonomic fibers
General Somatic Efferent (GSE) fibers innervate skeletal muscle (these are axons of alpha and gamma motor neurons)