The lines parallel to the normal to the ...

The lines parallel to the normal to the curve `x y=1` is/are `3x+4y+5=0` (b) `3x-4y+5=0` `4x+3y+5=0` (d) `3y-4x+5=0`

`3x+4y+5=0`

`3x-4y+5=0`

`4x+3y+5=0`

`3y-4x-5=0`

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B, D

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