Immunological Techniques
The competitive immunoassay can be used

commonly to detect trace amounts of drugs.
to detect antibody associated with allergies (IgE)
both (a) and (b)
to detect very small amounts of antigen

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Immunological Techniques
In Rocket Immunodiffusion the length of the rocket is

proportional to the amount of antibody placed in each well
proportional to the amount of antigen placed in each well
inversely proportional to the amount of antibody placed in each well
inversely proportional to the amount of antigen placed in each well

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