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: Microbiology
Chlamydia causes -a) Infertilityb) Pneumothoraxc) Pelvic inflammatory diseased) Congenital malformation in fetus 
Select and explain. 
A. a, B. ac, C. ad, D. b
B: ac
Answer: B: ac 
Explanation: None