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: Biochemistry
True statements about PCR -a) Protein amplificationb) DNA amplificationc) Same as western blot testd) Detection of infecting organisms 
Select and explain. 
A. c, B. d, C. bd, D. ac
C: bd
Answer: C: bd 
Explanation: As PCR can be used to amplifying DNA sequences from any source - viral, bacterial, plant or animal, it can be used for detection of infecting organism.