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': 'Bacterial "finger printing" illustrate that periodontal pathogens are \nSelect and explain. \nA. Contagious, B. Non-contagious, C. Transmissible within member of same colonies, D. Non transmissible', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]