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
Fellypressin is a 
Select and explain. 
A. Vaso dilator, B. Vaso constrictor, C. Neuroleptic drug, D. Anti coagulant
B: Vaso constrictor
Answer: B: Vaso constrictor 
Explanation: None