<prompt> Clubbing is least common in:Squamous cell carcinomaAdenocarcinomaSmall cell carcinoma of lungMesothelioma  <response>: Answer is C Small cell Ca of Lung: Skeletal connective tissue syndromes including clubbing is usually seen in no n small cell carcinomas H-1 6th Clubbing is thus least common with small cell carcinoma of lung 