<prompt> 2 year old boy presented with abdominal distension, chronic diarrhoea, severe anaemia and failure to thrive. Which of the following is the investigation of choice?Intestinal biopsyAntinuclear antibodyAntiendomyseal antibodyAnti milk protein antibody  <response>: The given clinical feature suggest diagnosis of Celiac disease. Anti endomyseal antibody and anti tissue transglutaminase antibody help in diagnosis of celiac disease. 