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
Example of Physiological Antagonism is: 
Select and explain. 
A. Heparin protamine, B. Prostacydine-thromboxane, C. Adrenaline-phenoxybenzamine, D. Physostigmine-acetylcholine
B: Prostacydine-thromboxane
Answer: B: Prostacydine-thromboxane 
Explanation: Prostacydine-thromboxane