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
Organism commonly causing sterility in pelvic Inflammatory disease is : 
Select and explain. 
A. Gonococcus, B. Streptococcus, C. Staphylococcus, D. Hemophilus
A: Gonococcus
Answer: A: Gonococcus 
Explanation: Gonococcus