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 hold somebody to ransom

To keep captive and demand concession
To offer bribe
To humiliate
To blackmail and extract money

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Idiom
Select the correct statement about active and passive immunity.

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
The antibodies utilized in active immunity are acquired from another organism
Immunological memory is established by passive immunization

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