This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
An advanced diagnostic technique which has been suggested as an alternative to culture methods is 
Select and explain. 
A. Polymerase chain reaction, B. Direct immunofluorescence, C. Latex agglutination, D. Indirect immunofluorescent microscope assay
A: Polymerase chain reaction
Answer: A: Polymerase chain reaction 
Explanation: .