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The value of `lambda` for which the circle `x^(2)+y^(2)+2lambdax+6y+1=0` intersects the circle `x^(2)+y^(2)+4x+2y=0` orthogonally, is

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The value of `lambda` for which the circle `x^(2)+y^(2)+2lambdax+6y+1=0` intersects the circle `x^(2)+y^(2)+4x+2y=0` orthogonally, is
A. `(11)/(8)`
B. -1
C. `(-5)/(4)`
D. `(5)/(2)`
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Correct Answer - C
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