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
[{'content': 'Which of the following is an aberrant epiphysis? \nSelect and explain. \nA. Coracoid process, B. Greater tubercle, C. Base of 1st metacarpal, D. Base of 2nd metacarpal', 'role': 'user'}, {'content': "Answer: D \nExplanation: Aberrant epiphysis is detion from the normal anatomy and is not always present. For example, the epiphysis at the head of the first metacarpal bone and at the bases of other metacarpals Ref: Gray's39e/p185-210", 'role': 'assistant'}]