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': 'Which of the following teeth are affected in Generalised periodontitis? \nSelect and explain. \nA. Incisors, B. Molars, C. Incisors, 1st molars and 3 other teeth., D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]