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
Medication used in treatment of idiopathic central precolcious puberty is: 
Select and explain. 
A. Exogenous gonadotrophins, B. Ethinyl estradiol, C. Gn RH analogues, D. Ethinyl estradiol
C: Gn RH analogues
Answer: C: Gn RH analogues 
Explanation: None