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
The most sensitive and rapid test for diagnosis of CMV retinitis is - 
Select and explain. 
A. Viral isolation from the intraocular fluid, B. Nucleic acid detection from the intraocular fluid, C. Viral antigen detection in vitreous, D. Viral antibody detection in the blood by ELISA
B: Nucleic acid detection from the intraocular fluid
Answer: B: Nucleic acid detection from the intraocular fluid 
Explanation: None