Idiom
Select the correct statement about active and passive immunity.

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

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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. To keep the wolf away from the door

To hold the difficulties and dangers in check
To keep off an unwanted and undesirable person
To keep away from extreme poverty
To keep alive

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