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': 'Which one of the following drugs increases gastrointestinal motility - \nSelect and explain. \nA. Glycopyrrolate, B. Atropine, C. Neostigmine, D. Fentanyl', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Neostigmine Cholinergic drugs and antiadrenergic drugs increase G.I. motility. o Anticholinergic drugs and adrenergic drugs decrease GI motility. o Amongst the given options, neostigmine is cholinergic (anticholinesterase). o Glycopyrrolate and atropine are anticholinergics. o Fentanyl is an opioid and opioids decrease intestinal motility.", 'role': 'assistant'}]