This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Medicine
Gold standard method of diagnosing celiac disease is 
Select and explain. 
A. Small bowel biopsy, B. Anti-endomysial antibodies, C. Blood picture, D. Biochemical test
A: Small bowel biopsy
Answer: A: Small bowel biopsy 
Explanation: Best screening test: Anti TTG antibody Confirmatory / Gold standard: Small Bowel biopsy