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 leave someone in the lurch

Constant source of annoyance to someone
None of these
To put someone at ease
To desert someone in his difficulties
To come to compromise with someone

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Idiom
Select the correct statement about active and passive immunity.

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
The antibodies utilized in active immunity are acquired from another organism

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