This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
Nilutamide is an: 
Select and explain. 
A. Anti-convulsant, B. Anti-androgen, C. Anti-progestin, D. Anti-oestrogen
B: Anti-androgen
Answer: B: Anti-androgen 
Explanation: Antiandrogen -Flutamide and bicalutamide, nilutamide antagonise androgen action on prostate carcinoma and have a palliative effect in advanced/metastatic cases. Because they increase androgen levels, combination with orchiectomy or GnRH analogs is required to produce a full therapeutic effect. (REF. Essentials of Pharmacology TD TRIPATHI 6th EDITION page no 828)