<prompt> Lack of ability of a part to do normal function is called as -ImpairmentDiseaseDisabilityHandicap  <response>: Ans. is c i.e., Disability 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 impairmentdisability, that limitsprevents fulfillment of a role considered normal depending on age, sex, social, cultural factors for that individualFor example,EventClassificationInterpretationAccidentLoss of footCannot WalkUnemployedDiseaseImpairmentDisabilityHandicapImpairs function of a personLoss of anatomical structure in the form of footWalking is a normal routine daily activity of a human beingLoses out his job because he cannot walk, so cannot fulfill his role in the society, i.e, earning for his family members 