This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of Health and Disease, Subject name: Social & Preventive Medicine
Loss of part or function - 
Select and explain. 
A. Impairment, B. Disability, C. Handicap, D. Disease
A: Impairment
Answer: A: Impairment 
Explanation: Ans. is 'a' i.e., Impairment o According to WHO definitions,Disease: Any abnormal condition of an individual that impairs functionImpairment: Any loss or abnormality of psychological, physiological or anatomical structure or functionDisability: (Because of impairment,) any restriction or inability to perform an activity in a range considered normal for a human beingHandicap: A disadvantage for a given individual, resulting from an impairmentv'disability, that limits/prevents fulfillment of a role considered normal (depending on age, sex, social, cultural factors) for that individual