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: Physiology
[{'content': 'Parasympathetic stimulation causes : \nSelect and explain. \nA. Decrease GI secretion, B. Bronchodilation, C. Sweat-secretion, D. Pupillary constriction', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Pupillary constriction', 'role': 'assistant'}]