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
[{'content': 'Alosetron is \nSelect and explain. \nA. 5HT1 receptor antagonist, B. 5HT2 receptor antagonist, C. 5HT3 receptor antagonist, D. Analogues of somatostatin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]