This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal tract, Subject name: Pharmacology
Most specific antiemetic for Chemotherapy induced vomiting is 
Select and explain. 
A. Domperidone, B. Granisetron, C. Tegaserod, D. Doxylamine
B: Granisetron
Answer: B: Granisetron 
Explanation: 5HT3 Antagonists *5HT3 antagonists like Ondansetron, Granisetron, Dolasetron, Tropisetron and Palanosetron are the most specific and effective agents in the management of chemotherapy-induced nausea vomiting and in nausea associated with upper abdominal irradiation. Ref:- Goodman & Gilman's Pharmacological basis of Therapeutics 13th Ed; Pg.No:- 935-6