Which of the following investigations should be done immediately to best confirm a non-matched blood transfusion reaction?

Q. Which of the following investigations should be done immediately to best confirm a non-matched blood transfusion reaction?

A.            Indirect Coomb’s test

B.            Direct Coomb’s test

C.            Antibody in patient’s serum

D.            Antibody in donor serum

Answer: Direct Coomb’s test