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If the lines `x=a_(1)y + b_(1), z=c_(1)y +d_(1)` and `x=a_(2)y +b_(2), z=c_(2)y + d_(2)` are perpendicular, then

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If the lines `x=a_(1)y + b_(1), z=c_(1)y +d_(1)` and `x=a_(2)y +b_(2), z=c_(2)y + d_(2)` are perpendicular, then
A. `a_(1)a_(2) + b_(1)b_(2) +1=0`
B. `a_(1)a_(2) +c_(2)c_(2)+1=0`
C. `a_(1)a_(2) + b_(1)b_(2)=0`
D. `a_(1)c_(2) + b_(1)c_(1)=0`
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Correct Answer - B
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