This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
Alosetron is 
Select and explain. 
A. 5HT1 receptor antagonist, B. 5HT2 receptor antagonist, C. 5HT3 receptor antagonist, D. Analogues of somatostatin
C: 5HT3 receptor antagonist
Answer: C: 5HT3 receptor antagonist 
Explanation: .