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Let A = {3, pi , sqrt(2) , - 5,3 + sqrt...

Let `A = {3, pi , sqrt(2) , - 5,3 + sqrt(7),2//7}`. The subset of A containig all the elements from it which are irrational number is :

A

`{pi,sqrt2,3+sqrt7}`

B

`{3,pi,2//7,-5,+3sqrt7}`

C

`{3,2//7,-5}`

D

{3,-5}

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The correct Answer is:
A
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