A. Western blotB. Southern blot
C. Northern blot
Visualization of a specific DNA or RNA fragment among the many thousand of contaminating molecules requires the convergence of the number of techniques collectively termed as blotting.
Southern blot → Detects DNA
Northern blot → Detects RNA
Western blot → Detects proteins (proteins are separated by electrophoresis, renatured and analyzed for interaction by hybridization with a specific labeled DNA probe).