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
Any loss or abnormality of psychological, or anatomical
structure or function is 
Select and explain. 
A. Disease, B. Impairment, C. Disability, D. Handicap
B: Impairment
Answer: B: Impairment 
Explanation: None