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. A tall order

A big demand
A royal summon
A big problem
A task difficult to perform

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Idiom
Mutation is

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

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