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. Though he has lot of money, yet all his plans are built upon sand.

established on insecure foundations
based on inexperience
resting on immature ideas
resting on cheap material

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Idiom
Mutation is

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

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