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
The fibre which is the thickest in human nerve is 
Select and explain. 
A. Touch, B. Pain, C. Temperature, D. Proprioception
D: Proprioception
Answer: D: Proprioception 
Explanation: Proprioception is carried by the thickest fibre A alpha (12-20 micrometer). Touch by A beta (5-12 um)Pain, temperature by A delta (2-5 um). Ref: Ganong&;s Review of medical physiology;25th edition; pg: 94; table 4-1.