If the segment intercepted by the parabola `y=4a x`with the line `l x+m y+n=0`subtends a right angle at the vertex, then`4a l+n=0`(b) `4a l+4a m+n=0``4a m+n=0`(d) `a l+n=0`A. 4 al+ n =0B. 4al+4am +n =0C. 4am+n=0D. al+n=0

If the segment intercepted by the parabola `y=4a x`with the line `l x+

1.	If the segment intercepted by the parabola `y=4a x`with the line `l x+m y+n=0`subtends a right angle at the vertex, then`4a l+n=0`(b) `4a l+4a m+n=0``4a m+n=0`(d) `a l+n=0`A. 4 al+ n =0B. 4al+4am +n =0C. 4am+n=0D. al+n=0
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If the segment intercepted by the parabola `y=4a x`with the line `l x+m y+n=0`subtends a right angle at the vertex, then`4a l+n=0`(b) `4a l+4a m+n=0``4a m+n=0`(d) `a l+n=0`A. 4 al+ n =0B. 4al+4am +n =0C. 4am+n=0D. al+n=0

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