To determine whether a bloodstain is of human or animal origin, the serologist will perform:

A. An analysis with Hemastix strips.

B. A precipitin test.

C. RIA.

D. The luminol test.

B. A precipitin test is the correct answer

Explanation:

To determine whether a bloodstain is of human or animal origin, the serologist will perform: A precipitin test.

The precipitin test is based on the interaction between antigen and antibody which results in the formation of antigen-antibody complexes and this visible precipitate antigen-antibody complexes is called precipitin.

Precipitin test is a serological test where antibody reacts with soluble antigen to produce a precipitate.

The precipitin test is used to distinguished whether the blood sample is from human or different sources.