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
Cinnarizine used for motion sickness is a 
Select and explain. 
A. 5HT4 - antagonist, B. H2 - antagonist, C. Antihistamine, D. NK1 antagonist
B: H2 - antagonist
Answer: B: H2 - antagonist 
Explanation: Cinnarizine is an antihistamine with anticholinergic property given for motion sickness & also used in the treatment of vertigo.