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
[{'content': 'Following is true about inverse agonist ? \nSelect and explain. \nA. Affinity + Intrinsic activity +, B. Affinity + Intrinsic activity 0, C. Affinity - Intrinsic activity ?, D. Affinity + Intrinsic activity -', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Affinity + Intrinsic activity - Receptors are specific binding site with functional correlate. In relation to action through receptors, two terms are impoant.", 'role': 'assistant'}]