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': 'Triad of factors determining the severity of malocclusion include: \nSelect and explain. \nA. Duration, Intensity and Frequency, B. Activity, Duration and Frequency, C. Frequency, Activity and Intensity, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The effects of any habit depends upon three factors:\n\nIntensity -\xa0it is the vigor with which the habit is\xa0performed.\nDuration - it is the amount of time spent on the\xa0habit.\nFrequency - it is the number of times the habit is\xa0activated in a day.\n\nAbove-mentioned triad has direct cause-effect relationship with the habit.', 'role': 'assistant'}]