This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infections of the genital tract, Subject name: Gynaecology & Obstetrics
The risk factors of acute pelvic inflammatory disease (PID) are the following except : 
Select and explain. 
A. Menstruating teenagers who have multiple sex paners, B. lUD users, C. Women with monogamous paner who had vasectomy, D. Previous history of acute PID
C: Women with monogamous paner who had vasectomy
Answer: C: Women with monogamous paner who had vasectomy 
Explanation: Risk factors of acute PID Menstruating teenagers Multiple sexual paners Absence of contraceptive pill use Previous history of acute PID IUD users Area with prevalence of STDs D.C.DUTTA&;S TEXTBOOK OF GYNAECOLOGY,Pg no:128,6th edition