This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pharmacology, Subject name: Pharmacology
An agonist is having? 
Select and explain. 
A. Affinity with intrinsic activity is 1, B. Affinity with intrinsic activity is 0, C. Affinity with intrinsic activity is-1, D. None
A: Affinity with intrinsic activity is 1
Answer: A: Affinity with intrinsic activity is 1 
Explanation: The agonist is an agent which activates a receptor to produce an effect similar to that of the physiological signal molecule. Affinity is the ability to bind to the target(receptor) intrinsic activity is producing a response after binding Agonist have Affinity with intrinsic activity is 1 Ref; KD Tripathi pharmacology 7th edition (page no; 41)