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The consecutive sides of a parallelogram...

The consecutive sides of a parallelogram are `4 x+5 y=0` and `7 x+2 y=0 .` One diagonal of the parallelogram is `11 x+7 y=9 .` If the other diagonal is `a x+b y+c=0,` then

A

`a=-1, b=-1, c=2`

B

`a=1, b=-1, c=0`

C

`a=-1, b=-1, c=0`

D

`a=1, b=1, c=1`

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The correct Answer is:
B
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HIMALAYA PUBLICATION-COORDINATE SYSTEMS, LOCUS AND STRAIGHT LINES-QUESTION BANK
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