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The lines px +qy+r=0, qx + ry + p =0,rx ...

The lines `px +qy+r=0, qx + ry + p =0,rx + py+q=0,` are concurrant then

A

`p+q+r=pqr`

B

`p^(3)+q^(3)+r^(3)=3pqr`

C

`p^(2)+q^(2)+r^(2)=2(pq+qr+rp)`

D

None of these

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The correct Answer is:
B
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