The latus ractum of a parabola whose dir...

The latus ractum of a parabola whose directrix is `x+y -2=0` and focus is `(3,-4),` is

A

`-3 sqrt2`

B

`3 sqrt2`

C

`-3//sqrt2`

D

`3//sqrt2`

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The correct Answer is:

B

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