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
Ketanserin is : 
Select and explain. 
A. 5HT1B antagonist, B. 5HT2 antagonist, C. 5HT1A agonist, D. 5HT1D antagonist
B: 5HT2 antagonist
Answer: B: 5HT2 antagonist 
Explanation: None