<prompt> Histopatholoty of a lung cancer shows clara cells probable diagnosis is -Squamous cell cancerBronchio alveolar cancerLarge cell cancerPapillary carcinoma  <response>: Ans. is b i.e., Bronchio alveolar cancer Ultrastructurally bronchoalveolar carcinoma are a heterogenous group, consisting of mucin secreting bronchiolar cells clara cells or rarely type II penumocytes. 