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
Chlamydiae are - 
Select and explain. 
A. Viruses, B. Fungi, C. Protozoa, D. Bacteria
D: Bacteria
Answer: D: Bacteria 
Explanation: Ans. is 'd' i.e., Bacteria Chlamydiae are obligate intracellular bacterial parasites of humans, animals and birds.