What type of analysis is used to identify blood types?

Serological analysis is the correct method used to identify blood types because it focuses on the detection of specific antigens present in the blood. Blood typing relies on the reaction between antibodies and these antigens found on the surface of red blood cells. This method can quickly determine whether blood contains type A, B, AB, or O antigens, allowing forensic scientists to match blood samples with individuals during investigations.

In contrast, DNA profiling involves analyzing an individual's specific DNA sequences to establish identity or familial relationships and is not used for determining blood types. Toxicological analysis assesses the presence of drugs, poisons, or other substances in biological samples, which does not pertain to blood typing. Chromatography is a technique used to separate mixtures into their individual components, but it does not provide information about blood type. Thus, serological analysis is specifically designed for blood type identification, making it the correct choice.