What does intermittent pain for 12 weeks of the preceding 12 months with relief from defecation, change in frequency of BM or change in form of stool (loose, watery, pellet-like) linked to luminal and mucosal irritants that alter motility, secretion, and pain sensitivity suggest?
1) Gastritis
2) Gallstones
3) Inflammatory bowel disease
4) Irritable bowel syndrome