The value of k such that the family of p...

The value of k such that the family of parabolas `y=cx^(2)+k` is the orthogonal trajectory of the family of ellipse `x^(2)+2y^(2)-y=c,` is

A

`1`

B

`1/2`

C

`1/3`

D

`1/4`

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The correct Answer is:

D

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