31.
A:
The detection of a particular protein by Western Blotting relies on the very specific interaction between the protein and its antibody.
B:
The detection of a particular protein by Western Blotting relies on labelling the protein with a specific dye.
C:
The detection of a particular protein by Western Blotting relies on labelling the antibody with a specific dye.
D:
The detection of a particular protein by Western Blotting relies on the denaturation of the protein.
The answer is: A