<prompt> What of the following is truea Viral warts spontaneously resolveb Plantar warts should not be excisedc Callosity are formed occupationallyd Corns are viral in etiologyacbcadb  <response>: WartsWarts are epidermal growths associated with human papilloma virus HPV infection.Histologically they are characterized by- hyperkeratosis hypertrophy of the horny layer- acanthosis hypertrophy of the spinous layer- papillomatosis- Koilocytes large keratinocytes with eccenteric nuclei are seenDifferent morphologic types of warts occur on different parts of body.Verruca vulgaris or common wart - fingers and toesVerruca plantaris plantar warts - soles palmsVerruca plana flat warts - face, legs handsCondylomata acuminata veneral warts - moist areas around the vulva, arms scrotumTreatment- - warts can be removed by a number of chemicals, including formalin, podophyllum etc.- surgical excision or curettage with electrodessication can also be used.- treatment of extensive areas of skin requires surgical excision under general anaesthesia.Recurrences are commonSome warts are risk factors for squamous cell carcinomaCorns CallositiesCorns and callosities both are hyperkeratosis due to chronic excessive pressure or friction on the skin for eg. callosities on the hands of gardeners and labourers 