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
[{'content': 'ROME III criteria for Irritable bowel syndrome AE \nSelect and explain. \nA. Improvement with defection, B. Rectal bleeding, C. Onset associated with change in frequency of stool, D. Onset associated with change in form of stool', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Rectal bleedingROME II Diagnostic Criteria for Functional Bowel Disorders-Irritable Bowel SyndromeFunctional Abdominal BloatingFunctional ConstipationFunctional DiarrheaUnspecifed Functional Bowel Disorder', 'role': 'assistant'}]