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: Anatomy
Which of the following is not a recognised form of epiphysis? 
Select and explain. 
A. Traction, B. Atavistic, C. Friction, D. Pressure
C: Friction
Answer: C: Friction 
Explanation: There are four types of epiphysis: Pressure epiphysis: The region of the long bone that forms the joint is called Pressure Epiphysis. Traction epiphyses: The regions of the long bone which are non-aicular, that is, not involved in the joint formation is called as Traction Epiphysis. Atavistic epiphyses: Fused bones are called as Atavistic. Aberrant epiphyses: These Epiphysis are detions from the norm and are not always present.