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. Will o' the wisp

Anything which eludes or deceives
To have desires unbacked by efforts
To act in a foolish way
To act in a childish way

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Idiom
Mutation is

a factor responsible for plant growth
a change which affects the offspring of F2 generation only
a change which affects the parents
a change that is inherited

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