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If the quadrilateral formed by the lines...

If the quadrilateral formed by the lines ax+bc+c=0. a'x+b'y+c=0, ax+by+c'=0, a'x+b'y+c'=0 has perpendicular diagonal, then

A

`b^(2)+c^(2)=b^(,2)+d^(2)`

B

`c^(2)+a^(2)=d^(2)+a^(,2)`

C

`a^(2)+b^(2)=a^(,2)+b^(,2)`

D

None of these

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The correct Answer is:
C
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