This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Two Drugs having opposite action on different receptor is which type of antagonism 
Select and explain. 
A. Psychological antagonism, B. Physical antagonism, C. Competitive antagonism, D. Non Competitive antagonism
A: Psychological antagonism
Answer: A: Psychological antagonism 
Explanation: Ref-KDT 7/e p58 Physiological antagonism describes the behavior of a substance that produces effects counteracting those of another substance (a result similar to that produced by an antagonist blocking the action of an agonist at the same receptor) using a mechanism that does not involve binding to the same receptor.