This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Preterm Labour, Subject name: Gynaecology & Obstetrics
Which of the following genital infections carries the highest risk for preterm delivery? 
Select and explain. 
A. Trichomonas vaginitis, B. Monilial vaginitis, C. Bacterial vaginosis, D. Human papilloma virus
C: Bacterial vaginosis
Answer: C: Bacterial vaginosis 
Explanation: BACTERIAL VAGINOSIS IN PREGNANCY Aboion Abruption Preterm labor Chorioamnionitis, Puerperal fever Intra uterine death.