If the line x-1=0 is the directrix of th...

If the line `x-1=0` is the directrix of the parabola `y^2-k x+8=0` , then one of the values of `k` is (a)1/8 (b) 8 (c) 4 (d) 1/4

A

`1/8`

B

`0`

C

4

D

`1/4`

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The correct Answer is:

C

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