Q 1659401314.     If `m` and `n` are distinct natural numbers, then

which of the following is/are integer( s) `?`

1. `m/n+n/m` , 2., `mn(m/n+n/m)(m^2+n^2)^(-1)`


3. `(mn)/(m^2+n^2)`


Select the correct answer using the codes given below.





CDS 2016
A

`1 text(and) ,2`

B

`text(Only 2)`

C

`text(2 and 3)`

D

`text(Only 3)`

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