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If alpha,beta are roots of the equation...

If `alpha,beta` are roots of the equation `lx^(2)` + mx + n = 0,then the equation whose roots are `alpha^(3) beta` and `alpha beta^(3)` ,is

A

`l""^(4)x^(2)-"nlm"^(2)-2"nlx"+n^(4)=0`

B

`l""^(4)x^(2)+"nlm"^(2)-2"nlx"+n^(4)=0`

C

`l""^(4)x^(2)+"nlm"^(2)-2"nlx"+n^(4)=0`

D

`l""^(4)x^(2)-"nlm"^(2)-2"nlx"-n^(4)=0`

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