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
False about K files is 
Select and explain. 
A. Made of stainless steel rectangular block, B. Have high fracture resistance, C. Have low cutting efficiency, D. Has less no of flutes
D: Has less no of flutes
Answer: D: Has less no of flutes 
Explanation: None