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: Orthopaedics
[{'content': 'All are features of cleidocranial dysostosis  except \nSelect and explain. \nA. Short stature, B. Wide foramen magnum, C. Short Metacarpals, D. Absent clavicle', 'role': 'user'}, {'content': 'Answer: C \nExplanation: They usually have long 2nd metacarpal\nAutosomal dominant condition', 'role': 'assistant'}]