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 use of combined OCP's is associated with an increased incidence of: 
Select and explain. 
A. Bacterial vaginosis, B. Chlamydial endocervicitis, C. Vaginal warts, D. Genital herpes
B: Chlamydial endocervicitis
Answer: B: Chlamydial endocervicitis 
Explanation: None