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
When the dental arch or part of it is farther away from the FH plane; the deviation is termed as: 
Select and explain. 
A. Attraction, B. Abfraction, C. Abstraction, D. Deviation
C: Abstraction
Answer: C: Abstraction 
Explanation: Vertical deviations with respect to the FH plane are:

Attraction: When the dental arch or part of it is closer to the Frankfort horizontal plane, it is referred to as attraction.
Abstraction: When the dental arch or a part of it is farther away from the Frankfort horizontal plane, it is referred to as abstraction.

Ref: Textbook of orthodontics Gurkeerat Singh 2nd ed page no 169