This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Pathology
[{'content': 'Anti transglutaminase antibody is seen in? \nSelect and explain. \nA. Celiac disease, B. SLE, C. Collagenous colitis, D. Tropical sprue', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The most sensitive tests are the presence of IgA antibodies to tissue transglutaminase or IgA or IgG antibodies to deamidated gliadin. TEXT BOOK OF ROBBINS BASIC PATHOLOGY NINTH EDITION PAGE.579', 'role': 'assistant'}]