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 has head at epiphysis \nSelect and explain. \nA. Distal phalanx, B. Middle phalanx, C. Thumb metacarpal, D. Third metacarpal', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Aberrant epiphysis: These epiphyses are detions from the norm and are not always present. For example, the epiphysis at the head of the first metacarpal bone.', 'role': 'assistant'}]