Q .     If `2x+3y+12=0` and `x-y+4lambda=0` are conjugate lines with respect to the parabola `y^2=8x`,then lambda is equal to

EAMCET 2008
A

`2`

B

`-2`

C

`3`

D

`-3`

HINT

We know that ,if two lines `l_1x+m_1y+n_1=0` and `l_2x+m_2y+n_2=0` are conjugate w.r.t parabola `y^2=4ax`,then `l_1n_2+l_2n_1=2am_1m_2`
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