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
Which of the following is used for isolation for chlamydia - 
Select and explain. 
A. Microimmunofluorescence, B. Yolk sac inoculation, C. ELISA, D. Immunofluorescence
B: Yolk sac inoculation
Answer: B: Yolk sac inoculation 
Explanation: None