Idiom
Select the correct statement about active and passive immunity.

The antibodies utilized in active immunity are acquired from another organism
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
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 play second fiddle

To do back seat driving
To reduce importance of one's senior
To be happy, cheerful and healthy
To support the role and view of another person
None of these

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