Idiom
For each of the following sentences four alternatives are given. You are required to choose the correct meaning of the idiom or phrase given or underlined in the sentence. It requires unparalleled courage to set the Thames on fire.

wreak evil on something
do a heroic deed
destroy with fire
do something extraordinary or brilliant

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Idiom
Select the correct statement about active and passive immunity.

The antibodies utilized in active immunity are acquired from another organism
Immunological memory is established by passive immunization
A vaccination is an example of the introduction of passive immunity into the body
Active and passive humoral immunity are both mechanisms of adaptive immunity that useantibodies

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