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
Which among the following is not a SERM ? 
Select and explain. 
A. Flutamide, B. Ormeloxifene, C. Tamoxifen, D. Raloxifene
A: Flutamide
Answer: A: Flutamide 
Explanation: None