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': 'Cinnarizine used for motion sickness is a \nSelect and explain. \nA. 5HT4 - antagonist, B. H2 - antagonist, C. Antihistamine, D. NK1 antagonist', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cinnarizine is an antihistamine with anticholinergic\xa0property given for motion sickness & also used in the treatment of vertigo.', 'role': 'assistant'}]