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': 'Frankel\tbehaviour\trating\tsystem\tdoes\tnot\tinclude\nfollowing behaviour: \nSelect and explain. \nA. Definitely positive, B. Definitely negative, C. Positive, D. Indifferent', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]