A person has lost his leg in an accident because of which he is not able to walk. This is -

Disability defined as lack of ability of an individual to do his routine activity in the manner or within the range considered normal for a human being disability is unable to carry out ceain activites considered normal for his age (not able to walk) due to an impairment (loss of leg) Disease defined as a condition in which body health is impaired, a depaure from a state of health, an alteration of human body interupting the performance of vital functions Impairment is defined as any loss or abnormality of psychological, physiological,or anatomical structure or function Handicap defined as a disadvantage for a given individual,resulting from an impairment or disability , that limits or prevents the fulfilement of a role that is normal for that individual ref ;(page no;44) 23rd edition of PARK&;s textbook of Preventive and Social medicine