If you perform precipitation reaction is in five different note antigens and see him from a single patient resulting in a precipitate in two of the five tubes what can you conclude?
a. This patient is actively making antibodies against the 2 antigens with the precipitate
b. This patient is actively making antibodies against the 3 antigens that did not result in a precipitate,
c. This patient has been exposed, either through natural processes or immunization, to the 2 antigers that resulted in a precipitate
d. This patient has actively had the diseases caused by the 2 antigens that resulted in a precipitato,
e. This patient has never been exposed to the 3 antigens that did not result in a precipitate