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: Surgery
How much length is increased in Z plasty when it is done at 60 degrees? 
Select and explain. 
A. 25%, B. 50%, C. 75%, D. 100%
C: 75%
Answer: C: 75% 
Explanation: None