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: Physiology
Stretch fibers are present in striated muscle, innervation is carried by 
Select and explain. 
A. A delta fiber, B. C fiber, C. unmyelinated fiber, D. Gamma fiber
D: Gamma fiber
Answer: D: Gamma fiber 
Explanation: None