If you suspect major deficiency of antibodies in a person, to which of the following woulu you look for confirmatory evidence?

Correct Option (d) Reason : Globulin is one of the protein found in serum and it includes proteins, enzymes, complement and immunoglobulins (antibody).

That's why, if major deficiency of antibodies is suspected in a person, the globulins in serum is tested as the confirmatory evidence.