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
The following is a characteristic symptom of chronic pelvic inflammatory disease : 
Select and explain. 
A. Dysuria, B. Constipation, C. Backache, D. Fever
C: Backache
Answer: C: Backache 
Explanation: Backache