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: Dental
[{'content': 'The use of cervical vertebrae as skeletal maturity indicators was given by: \nSelect and explain. \nA. Benninghoff, B. Hassel and Farman, C. Wolff, D. Brodie', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The shapes of the cervical vertebrae differ at each level of skeletal development, and this helps to determine the skeletal maturity of a person. This is the basis of Hassel and Farman system of evaluating skeletal maturity using cervical vertebrae.', 'role': 'assistant'}]