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
[{'content': 'Traction epiphysis is/are: \nSelect and explain. \nA. Head of humerus, B. Lesser tubercle of humerus, C. Deltoid tuberosity, D. Coracoid process', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Traction epiphysis are present at the ends of bones and develop due to traction by the attached muscles (and are therefore extracapsular), e.g.Greater (and lesser) tubercles in humerus and\xa0 greater (and lesser) trochanter in femur.\nPressure epiphysis are involved in weight transmission (and are intracapsular) for e.g. head of humerus and femur and condyles of humerus, femur, tibia etc.\nCoracoid process in scapula is an example of atavistic epiphysis.\nDeltoid tuberosity is not an epiphysis (it is present on the shaft/diaphysis).', 'role': 'assistant'}]