This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
The presence of anti-Saccharomyces cerevisiae antibody is a surrogate marker of one of the following: 
Select and explain. 
A. Celiac disease, B. Crohn's disease, C. Ulcerative colitis, D. Tropical sprue
B: Crohn's disease
Answer: B: Crohn's disease 
Explanation: Answer is B (Crohn's disease) Antibodies to the yeast `Saccharomyces cerevisiae' (ASCA) are found in 60 - 70% of patients with Crohn's disease and 10 - 15% of patients with ulcerative colitis.' Antibody Antiendomysial antibodyQ Antisaccharomyces cerevisiae antibodyQ Antineutrophilic cytoplasmic antibodyQ G.I. Disorder Celiac sprue Crohn's disease Ulcerative colitis