text: <unk>  sprue is classified based on the duration of symptoms into acute phase and a chronic phase.
option_0: Tropical sprue classification
option_1: Tropical sprue physical examination
option_2: Peptic ulcer classification
option_3: Ulcerative colitis classification
option_4: Crohn's disease classification
option_5: Irritable bowel syndrome classification
option_6: Zollinger-Ellison syndrome classification
option_7: Barrett's esophagus classification