This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Congenital Dislocation of Hip (C.D.H.), Subject name: Orthopaedics
60 degree angle of Z plasty causes how much increase in length? 
Select and explain. 
A. 25%, B. 50%, C. 75%, D. 100%
C: 75%
Answer: C: 75% 
Explanation: (c) 75%ExplanationZ plasty--relationship between angle of Z plasty and elongation:- 30degrees--25%elongation- 45degrees--50%elongation- 60degrees--75%elongation- 75degrees--100%elongation- 90degrees--125%elongation