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': 'When the dental arch or part of it is farther away from the FH plane; the deviation is termed as: \nSelect and explain. \nA. Attraction, B. Abfraction, C. Abstraction, D. Deviation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Vertical deviations with respect to the FH plane are:\n\nAttraction: When the dental arch or part of it is closer to the Frankfort horizontal plane, it is referred to as attraction.\nAbstraction: When the dental arch or a part of it is farther away from the Frankfort horizontal plane, it is referred to as abstraction.\n\nRef: Textbook of orthodontics Gurkeerat Singh 2nd ed page no 169', 'role': 'assistant'}]