This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Traction epiphysis is are 
Select and explain. 
A. Head of humerus, B. Lesser tubercle, C. Deltoid tuberosity, D. Ciracoid process
B: Lesser tubercle
Answer: B: Lesser tubercle 
Explanation: Traction epiphysis are usually present at the end if bones and develop due to traction by the attached muscle (and are therefore extracapsular), eg Greater (and lesser) tubercle in humerus and greater ( and lesser) trochanter in femur Ref: Gray's39e/p185-210