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': 'For partial agonist value of intrinsic activity should be: \nSelect and explain. \nA. 1, B. 0, C. Between 0 and +1., D. -1', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]