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: Dental
'Indifferent' fibers are 
Select and explain. 
A. Elastic fibers, B. Oxytalan fibers, C. Collagen fibers, D. None of the above
C: Collagen fibers
Answer: C: Collagen fibers 
Explanation: None