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': 'Clomiphene is: \nSelect and explain. \nA. Anti-gonadotrophin, B. Progesterone (antagonist), C. Oestrogen (paial agonist), D. Anti-androgenic', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Oestrogen (paial agonist)', 'role': 'assistant'}]