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': 'All of the following are true about Glycopyrrcolate except \nSelect and explain. \nA. It is a muscarine receptor antagonist, B. It decreases oropharyngeal secretions, C. It is a tertiary amine in structure, D. It is used as a preanesthetic medication', 'role': 'user'}, {'content': "Answer: C \nExplanation: Glycopyrrolate is quartenary amine which can't cross BBB and hence carries no CNS side effects.", 'role': 'assistant'}]