This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
Joint position and viberation is carried by: 
Select and explain. 
A. A-alfa, B. A-beta, C. Both, D. None
A: A-alfa
Answer: A: A-alfa 
Explanation: A-alfa fibers are associated with proprioception and lower motor neurons They are myelinated fibers Ref:Guyton and Hall textbook of medical physiology 12th edition,page number: 73