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: Gynaecology & Obstetrics
Clomiphene citrate is: 
Select and explain. 
A. Antiandrogen, B. Synthetic steroid, C. Antiestrogen, D. GnRH analogue
C: Antiestrogen
Answer: C: Antiestrogen 
Explanation: None