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. At one's beck and call

To be under one's subjugation
Enjoying oneself without caring for others
To be always at one's service
To be in an advantageous position

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Idiom
Agro forestry is

Growing tree after cutting crop
None of these
Growing tree for forest
Growing of tree with cultivation of crop in the same field

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