This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
Which of the following drugs is useful for treatment of advanced prostate cancer? 
Select and explain. 
A. Ganirelix, B. Cetrorelix, C. Abarelix, D. Goserelin
D: Goserelin
Answer: D: Goserelin 
Explanation: Drugs used in advanced prostate cancer are : *LHRH agonists ( medical castration ) - leuprolide, goserelin *Phosphorylated diethylstilbestrol *Androgen receptor blocking agents like flutamide, bicalutamide *Cyproterone acetate (also has progestogenic effect ) Ganirelix, cetrorelix and abarelix are GnRH antagonists Reference : page 1050 SRB's manual of surgery 5th edition