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
Clomiphene is: 
Select and explain. 
A. Anti-gonadotrophin, B. Progesterone (antagonist), C. Oestrogen (paial agonist), D. Anti-androgenic
C: Oestrogen (paial agonist)
Answer: C: Oestrogen (paial agonist) 
Explanation: Oestrogen (paial agonist)