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': 'H1 antagonist has all the functions except : \nSelect and explain. \nA. Antipruritic, B. Sedation, C. Decrease gastric acid secretion, D. Antivertigo', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]