This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Contraception, Subject name: Gynaecology & Obstetrics
The effectivity of NORPLANT remains for : 
Select and explain. 
A. 3 years, B. 5 years, C. 7 years, D. 10 years
B: 5 years
Answer: B: 5 years 
Explanation: Jadelle or Norplant 2 is a levonorgestrol contraining subdermal implant in 2 sialistic rods and is approved to use for 5 years Reference: William's Textbook of Obstetrics 24th edition page no 723