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The condition on a and b , such that the...

The condition on `a and b` , such that the portion of the line `a x+b y-1=0` intercepted between the lines `a x+y=0` and `x+b y=0` subtends a right angle at the origin, is `a=b` (b) `a+b=0` `a=2b` (d) `2a=b`

A

a=b

B

a+b=0

C

a=2b

D

2a=b

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