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: Medicine
Infection causing CAD - 
Select and explain. 
A. Chlamydia pneumonae, B. Streptococcus, C. Proteus, D. Uroplasma ureolyticum
A: Chlamydia pneumonae
Answer: A: Chlamydia pneumonae 
Explanation: None