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Assertion (A) : The normals to the planes x-lambday+z=1, 3x+2y-lambdaz+1=0 are perpendicular to each other if lambda+1=0. Reason (R ) : If the planes a_(1)x+b_(1)y+c_(1)z+d_(1)=0,a_(2)x+b_(2)y+c_(2)z+d_(2)=0 are perpendicular to each other then a_(1)a_(2)+b_(1)b_(2)+c_(1)c_(2)=0

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Both (A) and (R) are TRUE R is CORRECT REASON of A
Both (A) and (R) are true R is not CORRECTREASON of A
(A) is true but (R) is false
(A) is false but (R) is true

Answer :D


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