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: Pharmacology
[{'content': 'Lubiprostone is ? \nSelect and explain. \nA. New anticholinergic antidiarrhoeal, B. Serotonin agonist, C. New drug to treat peptic ulcer, D. To treat irritable bowel syndrome', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., To treat irritable bowel syndrome Lubiprostone is a PG analogue (EP4 receptor agonist), developed recently, represents a new strategy in the treatment of constipating-predominant IBS and chronic constipation. It acts by ? Stimulating CI- channel opening in the intestine. Increasing liquid secretion in gut. Decreasing transit time.", 'role': 'assistant'}]