This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': 'Choline esters like carbachol are most likely to cause which of the following adverse effects \nSelect and explain. \nA. Delirium, B. Anhydrosis (dry skin), C. Salivation, D. Tachycardia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Diarrhea, salivation, and lacrimation may be seen. The hea rate is usually slowed. Choline esters do not cross the blood-brain barrier, and therefore delirium is not an adverse effect. Ref:- KD Tripathi', 'role': 'assistant'}]