<prompt> Which is not a premalignant condition?Bowens diseaseLeukoplakiaAcanthosisnigricansSolar keratosis  <response>: ANSWER: C Acanthosis nigricansREF: Das text book of surgery 3rd edition page 104Premalignant conditions of oral cavity:LeukoplakiaErythroplakiaChronic hyperplastic candidiasisOral sub mucosal fibrosisSyphillitic glossitisSideropenic dysphagiaPremalignant condition of squamous cell carcinoma of skin:Bowens diseaseSenile keratosisXeroderma pigmentosaSolaractinic keratosisLong standing chronic ulcerLupus vulgaris 