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
To avoid conception D.M.P.A. is given : 
Select and explain. 
A. Monthly internals, B. 3 -- monthly, C. 6 -- monthly, D. Yearly
B: 3 -- monthly
Answer: B: 3 -- monthly 
Explanation: 3 -- monthly