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. Rajeev achieved success by resorting to a hole and corner method.

clever
obscure
usual
underhand

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Idiom
Mutation is

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

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