<prompt> Finger pattern may be impaired permanently in case ofAcanthosis nigricansLeprosySclerodermaSnow exposure  <response>: Ans. is b i.e., Leprosy Conditions modifying finger prints Finger prints may be modified in following situations.1 Temporary modification: It may be due toi Moderate ridge atrophy - loss of pattern : Coeliac disease.ii Incomplete ridge atrophy or alteration : Acanthosis nigricans, dermatitis, dry atrophic skin, scleroderma.iii Distance between ridges change no change in pattern: Rickets, acromegaly, infantile paralysis.iv Modification by applying physical agents by criminals: CO2, snow, corrosives, burns, eroding agents.2 Permanent modification: It occurs in leprosy, radiation, electric injury, by skin grafting and by complete destruction of skin. 