This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
How many muscle fibers are there in one motor unit in eye? 
Select and explain. 
A. 15, B. 30, C. 5, D. 50
C: 5
Answer: C: 5 
Explanation: No of muscle fibers ina motor unit are usually less than 10 Motor unit is the no of muscle fibers innervated by single neuron Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:85,86,87